Color replacement tool Chapter 5 : Borrowing the technology that powers the red-eye brush tool in Adobe Photoshop Elements, the color replacement tool in Photoshop CS lets you highlight
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manual template
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This is the reason why the previous page was blank (the
previous page is the back side of the cover)
Trang 3All rights reserved No parts of this work may be reproduced in any form or by any means - graphic, electronic, ormechanical, including photocopying, recording, taping, or information storage and retrieval systems - without thewritten permission of the publisher.
Products that are referred to in this document may be either trademarks and/or registered trademarks of the
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While every precaution has been taken in the preparation of this document, the publisher and the author assume noresponsibility for errors or omissions, or for damages resulting from the use of information contained in this document
or from the use of programs and source code that may accompany it In no event shall the publisher and the author beliable for any loss of profit or any other commercial damage caused or alleged to have been caused directly or
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Printed: decembar 2004 in (whereever you are located)
© 2004 Your company
Publisher Special thanks to:
All the people who contributed to this document, to mum and dad and grandpa, to my sisters and brothers and mothers in law, to our secretary Kathrin, to the graphic artist who created this great product logo on the cover page (sorry, don't remember your name
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Trang 4Part III Photoshop CS Bible 7
20 Fast Track to Photoshop CS
22
2 Chapter 2: Inside Photoshop
24 The Photoshop Desktop
39 Navigating in Photoshop
45 Customizing the Interface
58
3 Chapter 3: Image Management
61 The Resolution of Screen Images
61 How to Open, Duplicate, and Save Images
79 File Format Roundup
96 Adding Annotations
97 Resampling and Cropping
106
1 Chapter 4: Defining Colors
110 Working in Different Color Modes
121 Using Photoshop's Other Color Selection Methods
127 Introducing Color Channels
129 Trying Channels On for Size
133 Other Channel Functions
136 Color Channel Effects
138
2 Chapter 5: Painting and Brushes
139 Meet the Paint and Edit Tools
143 Basic Techniques
153 Brush Size and Shape
160 Brush Dynamics
168 Opacity and Strength, Flow and Exposure
170 Brush Modes
176
3 Chapter 6: Filling and Stroking
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183 Applying Gradient Fills
196 Applying Strokes and Arrowheads
201
4 Chapter 7: Retouching and Restoring
202 Cloning and Healing
214 Retouching Photographs
224 Stepping Back through Time
236
1 Chapter 8: Selections and Paths
245 Ways to Change Selection Outlines
255 Moving and Duplicating Selections
260 How to Draw and Edit Paths
277 Importing and Exporting Paths
280
2 Chapter 9: Masks and Extractions
282 Painting and Editing Inside Selections
285 Working in Quick Mask Mode
294 Generating Masks Automatically
304 Creating an Independent Mask Channel
307 Building a Mask from an Image
312
3 Chapter 10: Corrective Filtering
319 Heightening Focus and Contrast
331 Blurring an Image
351 Noise Factors
361
4 Chapter 11: Distortions and Effects
365 The Filter Gallery
367 The Pixelate Filters
369 Edge-Enhancement Filters
373 Distortion Filters
403 Adding Clouds and Spotlights
410
1 Chapter 12: Working with Layers
411 Sending a Selection to a Layer
414 Layer Basics
423 Selecting the Contents of Layers
427 Moving, Linking, and Aligning Layers
434 Applying Transformations
438 Masking and Layers
443 Working with Layer Comps
445
2 Chapter 13: The Wonders of Blend Modes
448 Opacity and Fill
450 Blend Modes
471 Advanced Blending Options
480 Dropping Out and Forcing Through
486 Whole Image Calculations
495
3 Chapter 14: Shapes and Styles
496 Drawing Shapes
505 The Bold and Beautiful Layer Styles
519 Modifying and Saving Effects
© 2004 Your company
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2 Chapter 17: Mapping and Adjusting Colors
561 Quick Color Effects
567 Quick Corrections
569 Hue Shifting and Colorizing
582 Making Custom Brightness Adjustments
599 Adjustment Layers
603 Correcting Camera Raw Images
606
3 Chapter 18: Printing from Photoshop
606 Understanding Printing Terminology
609 Printing Composites
621 Creating Color Separations
623 Printing Duotones
626 Spot-Color Separations
626 Organizing Images for Output
3 The Great-Grandmother of All Shortcut Tables
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and topics
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top-level chapter starts
Part
I
Trang 10ManagementPart II - Painting and RetouchingChapter 4- Defining ColorsChapter 5- Painting andBrushesChapter 6- Filling and StrokingChapter 7- Retouching and RestoringPart III - Selections,Masks, and FiltersChapter 8- Selections and PathsChapter 9- Masks and ExtractionsChapter 10-Corrective FilteringChapter 11- Distortions and EffectsPart IV - Layers, Objects, and TextChapter12- Working with LayersChapter 13- The Wonders of Blend ModesChapter 14- Shapes and
StylesChapter 15- Fully Editable TextPart V - Color and OutputChapter 16- Essential Color
ManagementChapter 17- Mapping and Adjusting ColorsChapter 18- Printing from
PhotoshopAppendix- Shortcuts and ModifiersColor Insert Index List of Figures List of Tables
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top-level chapter starts
Part
II
Trang 12About the Author
Deke McClellands most sinister books are the award-winning Photoshop CS Bible and Photoshop CS Bible, Professional Edition , now in their eleventh year with more copies in print than any other guides
on computer graphics Other subversive titles include Photoshop CS For Dummies, Photoshop
Elements For Dummies (both Wiley Publishing, Inc.), and Real World Illustrator (Peachpit Press.)
In 1989, Deke won the Benjamin Franklin Award for Best Computer Book Since then, he has receivedsimilarly diabolical honors from the Society for Technical Communication (once in 1994 and twice in1999), Photo>Electronic Imaging (1999), the American Society of Business Press Editors (1995 and2000), the Western Publications Association (1999), and the Computer Press Association (1990, 1992,
1994, 1995, 1997, and twice in 2000) In 1999, Book Bytes named Deke its Author of the Year In
2002, the National Association of Photoshop Professionals voted Deke into the Photoshop Hall ofFame
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top-level chapter starts
Part
III
Trang 14Copyright © 2004 by Wiley Publishing, Inc., Indianapolis, Indiana
Published simultaneously in Canada
Library of Congress Control Number: 2004100363
ISBN: 0-7645-4178-1
10 9 8 7 6 5 4 3 2 1
1O/QZ/QS/QU/IN
No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or
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ASSISTANCE IS REQUIRED, THE SERVICES OF A COMPETENT PROFESSIONAL PERSON SHOULD BE SOUGHT NEITHER THE PUBLISHER NOR THE AUTHOR SHALL BE LIABLE FOR DAMAGES ARISING HEREFROM THE FACT THAT AN ORGANIZATION OR WEBSITE IS
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Wiley also publishes its books in a variety of electronic formats Some content that appears in printmay not be available in electronic books
Trademarks: Wiley, the Wiley Publishing logo, and related trade dress are trademarks or registered
trademarks of Wiley Publishing, Inc., and/or its affiliates in the United States and other countries, andmay not be used without written permission Photoshop is a trademark or registered trademark ofAdobe Systems, Inc All other trademarks are the property of their respective owners Wiley Publishing,Inc., is not associated with any product or vendor mentioned in this book
About the Author
Born near Verona in 1511, Deke McClelland was once the most popular portrait painter in all of
Florence His career came to a grinding halt a few centuries later with the advent of photography.Broken, penniless, and deeply resentful, Deke dedicated his energies to the development of a
Trang 15pathogen so insidious that it would one day contaminate each and every photograph on the planet.Code named the Pernicious Instrument of eXtreme EviL (or "pixel" for short), Deke smuggled histerrible creation into The New World and set it free When his invention turned out to help rather thanhurt photography, he went quite mad He now inflicts his revenge by writing educational books andhosting training videos.
His most sinister books are the award-winning Photoshop CS Bible and Photoshop CS Bible, Professional Edition (www.amazon.com/deke ), now in their eleventh year with more copies in print
than any other guides on computer graphics Other subversive titles include
Trang 16IV
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Foreword Regarding Mr McClelland
The first version of Adobe Photoshop I was involved with was Photoshop 2 As it happens, in diggingthrough my archive of ancient magazines, I discovered that this was also the first version for which Icould find a review by Deke McClelland
I first knew Deke as a reviewer and later as an instructor
As a reviewer, Deke brought a sharp wit and deep understanding of the material together with analmost childlike exuberance When he liked something, he really liked it, and he let you know When hedisliked something, he was equally clear about his feelings The latter could be depressing for those of
us who had worked long and hard on a release, but we had to take him seriously, since his enthusiasm
at other times made it clear that he wasn't just being a curmudgeon for the sake of being a
curmudgeon
Deke also wasn't afraid to go against the norm in his reviews if his instincts took him there His review
of Photoshop 3, for example, did not start by discussing the addition of layers and expended a
relatively long paragraph on singing the praises of Filter Factory When he felt products or trends wereoverhyped, he didn't hesitate to play the role of the little boy standing up and pointing out that theemperor has no clothes Reading his reviews was fun as long as you weren't the emperor
I've seen Deke teach at various Photoshop events and the same spirit comes through in person Heknows his stuff He knows how he feels about things He wants to share both his knowledge and hisfeelings, and he has the communication skills to do so
On the other hand, Deke isn't afraid to make fun of himself, and he can at times seem a bit demented
in his work The phrase "sick, twisted, little puppy" comes to mind Look through the examples in thisbook and you'll see that strange sense of humor at work He's clearly creating images driven by a giddysense of fun
Deke McClelland has evolved himself into an industry of videos, teaching appearances, and books
The Photoshop Bible stands at the center of all that It isn't just a recapitulation of the material in the
product manual It isn't just a tour through each of the features one at a time It will take you throughmost if not all of the territory encompassed by Photoshop, but it's a trip with an ebullient guide whowants to share his joy in the territory Not just the main routes, but the nooks and crannies as well You
can use the Photoshop Bible as a reference book, but the big lesson that Deke conveys is that as
daunting as Photoshop can sometimes seem, it can also be a lot of fun Revel in it
Mark Hamburg
Adobe Fellow
November 2003
Trang 18V
Trang 195 Preface
Preface
It's hard to know how to introduce a book especially one as gargantuan as this I feel like I shouldlead with something momentous, something that you'll remember Something that'll make you want tobuy this book, take it home, and love it forever But all I can think of is the following
Hello and welcome to the Photoshop Bible , the bestselling big fat book on Photoshop in publishing
history I've done my best to cover everything and make my prose at least occasionally entertaining.Naturally, I hope you learn a lot But I also hope you have a really swell time while you're at it, because
if you're not having fun, your enemies are surely gloating Unless you don't have any enemies, in whichcase you must be having fun because you're such a pleasure to be around Kudos to you, friend
As you prepare yourself for the sheer joy you're about to experience, let me tell you a little something
about this book Now in its tenth year, the Photoshop Bible is the longest continuously published title
on Adobe Photoshop Not coincidentally, it also happens to be the bestselling reference guide on thetopic, with a total of 14 U.S editions, dozens of localized translations in foreign lands, and more than amillion copies in print worldwide This makes it not only the most successful book of its kind but alsoone of the most successful books on any electronic publishing topic ever printed
Of course, "bestseller" doesn't necessarily translate to "best" once upon a time, Furbies were all the
rage But the Photoshop Bible seems to have withstood the test of time, and while I may have inertia
to thank, I hope the book's enduring appeal is at least in part the result of the time and effort I put intoit
The driving philosophy behind the Photoshop Bible is a simple one: Even the most intimidating topic
can be made easy if it's explained properly This goes double when the subject of the discussion issomething as modest as a piece of software Photoshop isn't some remarkable work of nature thatdefies our comprehension It's nothing more that a commercial product designed by a bunch of regularpeople like you for the express purpose of being understood and put to use by a bunch of regularpeople like you If I can't explain something that inherently straightforward, shame on me
I've made it my mission to address every topic head on no cop-outs, no apologies Everything's here,from the practical benefits of creating accurate masks to the theoretical wonders of designing your owncustom layer styles I wasn't born with this knowledge, and there are plenty of times when I'm learningwith you But when I don't know how something works, I do the research and figure it out, sometimesdiscussing features directly with the programmers and sometimes taking advantage of other sources
My job is to find out the answers, make sure those answers make sense, and pass them along to you
as clearly as I can
I also provide background, opinions, and occasional attempts at chummy, even crummy, humor A drylisting of features followed by ponderous discussions of how they work doesn't mean squat unless Iexplain why the feature is there, where it fits into your workflow, and on occasion whether or not it'sthe best solution I am alternatively cranky, excited, and just plain giddy as I explain Photoshop, and Imake no effort to contain my criticism or enthusiasm This book is me walking you through the
program as subjectively as I would explain it to a friend About This Edition of the Book
I try to make every update to the Photoshop Bible special, particularly for those of you who purchase
the book on a regular basis, and this edition is no exception Naturally, I cover all the new features,including the enhanced File Browser, the Histogram and Layer Comps palettes, the Match Color andShadow/Highlight commands, the Lens Blur filter, the Camera Raw dialog box, type on a path, and therest This book has been scrutinized from head to toe, thoroughly dissected, filled to the breaking pointwith all sorts of tips and tricks to improve your workflow and enhance your images, and finally carefullyreassembled into the weighty tome you hold in your hands
Throughout the writing of this edition, I've been lucky enough to have the talents of two extremely
capable collaborators, my longtime Photoshop Bible editor Amy Thomas Buscaglia and Total
Training's project director Jason Woliner Together, we braved long nights and looming deadlines todeliver what I consider to be the finest update since the last edition Amy, Jason, and I hope you agree
it was time well spent
Like all versions of the Photoshop Bible , this is a reference guide, not a tutorial I do not make the
Trang 20and lets you share and save multiple versions of files over a network.
Be warned, however, that Adobe has not simply repackaged the previous versions of its graphicsprograms with a "CS" sticker slapped on the box cover Besides the sleek, flowery, velveteen new look
of the packaging, the good folks at Adobe made sure that each program received a full, exhaustiveupgrade worthy of release as a new version If they hadn't, my work in updating this book would havebeen a breeze Why two Photoshop CS Bibles?
When you pulled this book off the bookstore shelf, you may have noticed a similarly titled book nearby:
the Photoshop CS Bible, Professional Edition If you didn't, you should see it soon because it's due out
shortly after this book hits the shelves Either way, you may logically be wondering: Why two
Photoshop Bibles ?
The Professional Edition , which first arrived on the scene a couple months after the Photoshop 7 Bible
was published, exists for a few main reasons As the amount of information that I needed to cover in
the Photoshop Bible increased, so did the size of the book, until it was topping out at more than 1,100
pages It became pretty clear that there was a demand for a tighter, more streamlined book; one thatassumed a solid understanding of the program and focused on more advanced features and
techniques Coincidentally, there was also a sizable call for more color in the Photoshop Bible Thus, the Photoshop Bible, Professional Edition was born: A hardcover, full-color (and thus more
expensive), slimmed-down, more advanced book Which Photoshop CS Bible is right for you?
Don't for an instant think that the book you currently hold in your hands is some sort of dime-store,slapdash, inferior model In fact, as I mentioned earlier, there's a great deal of information in this book
that you simply won't find in the Professional Edition That's because I've made sure that this edition,
sometimes referred to as the "standard edition," is a comprehensive, cradle-to-grave resource guidethat contains tips and insights valuable to all levels of Photoshop users Topics included in the
standard edition that aren't covered in the Professional Edition include navigation, preferences, tool
presets, workspaces, resampling and resolution, file formats, color channels and models, the
eyedropper tool, gradients, the basic selection tools, paths, text, Color Settings, and CMYK printing.Additionally, you get the comprehensive guide to Photoshop's default keyboard shortcuts found at theback of the book
That said, if you own one of the previous editions of the Photoshop Bible or you're fairly experienced with Photoshop, the Photoshop CS Bible, Professional Edition might well be more up your alley Topics that receive either exclusive or dramatically expanded coverage in the Professional Edition
include Levels, Curves, hue and saturation adjustments, the Channel Mixer, pattern creation, layerstyles, history, the Render filters, actions, batch renaming and processing, arbitrary and displacementmaps, the Custom filter, the sRGB color space, and Adobe ImageReady CS Additionally, the
Professional Edition is where you'll find in-depth coverage of Photoshop CS's powerful new Camera
Raw capabilities (though we explore the basics in this edition)
My goal was to create two independent books with as little overlap as possible For what it's worth, theareas of overlap revolve mostly around Photoshop CS's upgraded capabilities, such as the File
Browser enhancements, Lens Blur filter, and the Match Color command I'm not advising that you getboth books, but some readers will, and I want them to be absolutely satisfied
Conventions
Trang 21Every computer book conforms to its own special brand of logic, and this one is no exception Although
I try to avoid pig latin ellway, orfay hetay ostmay artpay I do subscribe to a handful of conventions thatyou may not immediately recognize Vocabulary
Call it computerese, call it technobabble, call it the indecipherable gibberish of incorrigible propellerheads The fact is, I can't explain Photoshop in graphic and gruesome detail without occasionallyreverting to the specialized language of the trade However, to help you keep up, I can and have
italicized vocabulary words (such as bit depth ) with which you may not be familiar or which I use in an
unusual context An italicized term is followed by a definition
If you come across a strange word that is not italicized (that bit of italics was for emphasis), look it up
in the index to find the first reference to the word in the book Commands and options
To distinguish the literal names of commands, dialog boxes, buttons, and so on, I capitalize the first
letter in each word (for example, click the Cancel button ) The only exceptions are option names, which can be six or seven words long and filled with prepositions such as to and of Traditionally, prepositions and articles (a, an, the ) don't appear in initial caps, and this book follows that time-
honored rule, too
When discussing menus and commands, I use an arrow symbol to indicate hierarchy For example,
Choose File ® Open means to choose the Open command from the File menu If you have to display
a submenu to reach a command, I list the command used to display the submenu between the menu
name and the final command Choose Image ® Adjustments ® Invert means to choose the
Adjustments command from the Image menu and then choose the Invert command from the
Adjustments submenu The whole platform thing
This is a cross-platform book, which means it's written for both Windows and Macintosh users
Photoshop is virtually identical on the two platforms, so it makes little difference However, the PC andMac keyboards are different The Ctrl key on the PC translates to the Command key (z) on the Mac Alttranslates to Option And because Apple's mice do not include right mouse buttons, right-clicking onthe PC becomes Control-clicking on the Mac Throughout this book, I try to make things as
unambiguous as possible by mentioning the Windows keystroke first with the Macintosh equivalentsecond, usually in parentheses Version names and numbers
A new piece of software comes out every 15 minutes That's not a real statistic, mind you, but I bet I'mnot far off As I write this, Photoshop has advanced past numbers altogether and arrived at Version
CS But by the time you read this, the version may be CS.01 or CS 8.0.1 or some other minute update
to the product Heck, it might have even progressed to a whole new set of letters entirely You could be
working in Photoshop IH (Innovative Hangout), Photoshop PH (Prolific Habitat), or even Photoshop
DB (Demiurgic Bog) So know that when I write Photoshop CS , I mean any version short of the next
major upgrade to the product, whatever that may be
Similarly, when I write Photoshop 7 , I mean Versions 7.0 and 7.0.1, Photoshop 6 , means Versions 6.0 and 6.0.1; Photoshop 5 means Versions 5.0, 5.0.2, and 5.5; Photoshop 4 means Versions 4.0 and 4.0.1; Photoshop 3, means Versions 3.0, 3.0.1, 3.0.3, 3.0.4, and 3.0.5 well, you get the idea Icons
Like just about every computer book currently available on your greengrocer's shelves, this one
includes alluring icons that focus your eyeballs smack dab on important information The icons make iteasy for folks who like to just skim books to figure out what the heck's going on Icons serve as littleinsurance policies against short attention spans On the whole, the icons are self-explanatory, but I'llexplain them anyway.Caution
The Caution icon warns you that a step you're about to take may produce disastrous results Well,perhaps "disastrous" is an exaggeration Inconvenient, then Uncomfortable For heaven's sake, usecaution.Note
The Note icon highlights some little tidbit of information I've decided to share with you that seemed atthe time to be remotely related to the topic at hand I might tell you how an option came into existence,why a feature is implemented the way it is, or how things used to be better back in the old
days.Photoshop
The Photoshop CS icon explains an option, a command, or a feature that is brand-spanking new to thislatest revision If you're already familiar with previous versions of Photoshop, you might just want toplow through the book looking for Photoshop CS icons and see what new stuff is out there.Tip
This book is bursting with tips and techniques If I were to highlight every one of them, entire pageswould be gray with light bulbs popping out all over the place The Tip icon calls attention to shortcuts
Trang 22If you want to share your insights, comments, or corrections, please e-mail me at
pcsbible@dekemc.com Don't fret if you don't hear from me for a few days, or months, or ever I read
every letter and try to implement nearly every constructive idea anyone bothers to send me But
because I receive hundreds of reader letters a week, I can respond to only a small percentage ofthem.Note
Please, do not write to ask me why your copy of Photoshop is misbehaving on your specific computer Iwas not involved in developing Photoshop, I am not employed by Adobe, and I am not trained in
product support Adobe can answer your technical support questions way better than I can, so I leave it
to the experts
Now, without further ado, I urge you to turn the page and advance forward into the great untamedfrontier of image editing Soon, you will know things you never knew before, you will see things younever saw before, and you will gain insights and shed pounds from the expenditure of pure thinkingenergy (Such results are not typical.) But whatever you do, don't take this book to bed, fall asleep, andlet it topple onto your face It will crush you like a squishy-squashy-ooshy-bug, only more messily
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top-level chapter starts
Part
VI
Trang 24Chapter 1: Introducing Photoshop CS What Is Photoshop?
Many of you already know the answer to this question You know what Photoshop does, the variouspurposes it serves, where it fits into the computer design scheme, how much it costs at 15 differentmail order sites, its complete history (from its inception as a bit of image conversion code called
Display to its first shipping version, Barneyscan XP, to the present day), and the names of everyone onthe development team You're the folks who keep me awake at night, because it's the job of this book
to share information on Photoshop that even you didn't know.
But just as likely, you're part of the larger group of people who have a vague sense of what Photoshopdoes but are a little shaky on some of the details You know the program lets you modify photographs,for example, but how exactly it does this is far from crystal clear Or perhaps you have no idea whatPhotoshop is Someone installed the program on your computer, threw this book in your lap, and said,
"Go!" If one of these scenarios describes you, don't worry we were all beginners at Photoshop once,and we'll all have ample opportunity to be beginners at something else in the future So before we goany further, let's get one thing settled for once and for all: just what exactly is Photoshop?
Adobe Photoshop Photoshop is the name of the software, Adobe Systems is the name of the
company that develops and sells it is a professional-level image-editing application It allows you tocreate images from whole cloth or, more likely, modify scanned artwork and digital photographs.Photoshop is available for use on computers equipped with either Microsoft Windows or Apple's
Macintosh operating system
Mind you, Photoshop isn't just any image-editing application It's the most powerful, most ubiquitousimage-editing application in the world Despite hefty competition over the years from more than ahundred programs ranging in price from virtually free to a few thousand dollars a pop, Photoshopremains the most popular design software in use today Where professional image editing is
concerned, Photoshop's not just the market leader it's the only game in town
Such a lack of competition is rarely a good thing But in Photoshop's case, it has played out remarkablywell The program's historically lopsided sales advantage has provided Adobe with a clear incentive toreinvest in Photoshop and regularly enhance, and even overhaul, its capabilities It's as if each newversion of Photoshop is competing with its predecessors for the hearts and minds of the digital artcommunity Meanwhile, other vendors have had to devote smaller resources to playing catch-up.Some, such as Jasc Software, with its Windows-only Paint Shop Pro, have hung in there and remainedcommercially viable But such success stories are few and far between Although competitors haveprovided some interesting and sometimes amazing capabilities, the sums of their parts have moreoften than not fallen well short of Photoshop's
As a result, Photoshop rides a self-perpetuating wave of market leadership It wasn't always the bestimage editor, nor was it the first But its deceptively straightforward interface combined with a fewterrific core functions made it a hit from the moment of its first release More than a dozen years laterthanks to substantial capital injections from Adobe and highly creative programming on the parts ofPhotoshop's engineering staff and its originator Thomas Knoll Photoshop has evolved into the mostpopular program of its kind
6.1.1 Image-Editing Theory
Image-Editing Theory
Like any image editor , Photoshop enables you to alter photographs and other scanned artwork You
Trang 25can retouch an image, apply special effects, swap details between photos, introduce text and logos,adjust color balance, and even sharpen the focus of a photograph Photoshop also provides everythingyou need to create artwork from scratch, including a suite of vector drawing tools and a highly
specialized painting palette These tools are fully compatible with pressure-sensitive tablets, so youcan create naturalistic images that closely mimic watercolors and oils Bitmaps versus vectors
Image editors fall into the larger software category of painting programs In a painting program, you draw a line, and the application converts it to tiny square dots called pixels The painting itself is called
a bitmapped image , but bitmap and image are equally acceptable terms.Note
Photoshop uses the term bitmap exclusively to mean a black-and-white image, the logic being that each pixel conforms to one bit of data, 0 or 1 (off or on) To avoid awkward syllabic mergers such as pix-map and because forcing a distinction between working with exactly two colors or anywhere from
four to 16 million colors is entirely arbitrary I use the term bitmap more broadly to mean any imagecomposed of a fixed number of pixels, regardless of the number of colors involved
What about other graphics applications, such as Adobe's own Illustrator? Appli-cations such as
Illustrator, Macromedia FreeHand, and CorelDraw fall into a different category of software called
drawing programs Drawings comprise vector objects , which are independent, mathematically defined lines and shapes For this reason, drawing programs are sometimes said to be vector-based or object-oriented
As luck would have it, Photoshop spans the chasm between conventional painting and drawing
programs by providing many of the best features of both In addition to its wealth of image-editing andorganic-painting capabilities, Photoshop permits you to add vector-based text and shapes to yourphotographic images These features don't altogether take the place of a drawing program, but theyhelp to make Photoshop an increasingly flexible and dynamic image-creation environment The upsand downs of painting
As you might expect, painting programs and drawing programs each have their strengths and
weaknesses The strength of a painting program is that it offers a straightforward approach to creating
images For example, although many of Photoshop's features are complex exceedingly complex on
occasion its core painting tools are as easy to use as a pencil You alternately draw and erase untilyou reach a desired effect, just as you've been doing since grade school
In addition to being simple to use, each of Photoshop's core painting tools is fully customizable It's as
if you have access to an infinite variety of crayons, colored pencils, pastels, airbrushes, watercolors,and so on, all of which are erasable Doodling on the phone book was never this much fun
Because painting programs rely on pixels, they are ideally suited to electronic photo-graphy Whethercaptured with a scanner or digital camera, an electronic photograph is composed of thousands or eventens of millions of colored pixels A drawing program such as Illustrator may let you import such aphotograph and apply very simple edits, but Photoshop gives you complete control over every pixel,entire collections of pixels, or independent elements of pixels As witnessed by a quick examination ofthe pictures in this book, a photograph can become anything
The downside of paintings and electronic photos is that they are ultimately finite in scale Because a
bitmap contains a fixed number of pixels, the resolution of an image the number of pixels in an inch, a
centimeter, or some other allotted space changes with respect to the size at which the image isprinted Print the image small, and the pixels become tiny, which increases the resolution of the image.Like the millions of cells in your body, tiny pixels become too small to see and thus blend together toform a cohesive whole, as in the first image in Figure 1-1 Print the image large and the pixels grow,which decreases the resolution Large pixels are like cells viewed through a microscope; once you candistinguish them independently, the image falls apart, as in the second example in the figure Theresults are jagged edges and blocky transitions The only way to remedy this problem is to increase thenumber of pixels in the image, which increases the size of the file on
Trang 26Figure 1-1: When printed small, an image appears smooth and sharp (left) But when enlarged, theimage breaks down into jagged transitions and grain (right).Cross-Reference
Bear in mind that this is a very simplified explanation of how images work For a more complete
description that includes techniques for maximizing image resolution and quality, read
"How Images Work" at the outset of Chapter 3 The downs and ups of drawing
The process of creating a vector-based drawing might more aptly be termed "constructing, " because
you actually build lines and shapes point by point and stack them on top of each other to create afinished image Each object is independently editable one of the key structural advantages of anobject-oriented approach but you're still faced with the task of building your artwork one chunk at atime
Nevertheless, because a drawing program defines lines, shapes, and text as mathematical equations,
these objects automatically conform to the full resolution of the output device, whether it's a laser
printer, an imagesetter, or a film recorder The drawing program sends the math to the printer and the
printer renders the math to paper or film In other words, the printer converts the drawing program's
equations to printer pixels Your printer offers far more pixels than your screen a 600-dot-per-inch (dpi)laser printer, for example, offers 600 pixels per inch (dots equal pixels), whereas most screens arelimited to 150 pixels per inch or fewer So the printed drawing appears smooth and sharply focusedregardless of the size at which you print it, as shown in Figure 1-
bitmapped images work A thumbnail drawing of a garden that contains hundreds of leaves and petalsconsumes several times more disk space than a poster-sized drawing that comprises three
rectangles When to use Photoshop
Thanks to their specialized methods, painting programs and drawing programs fulfill distinct and
Trang 27divergent purposes Photoshop and other painting programs are best suited to creating and editing thefollowing kinds of artwork:
Scanned photos, including photographic collages and embellishments that originate from scansImages captured with any type of digital camera
Still frames captured from videotape or film
Realistic artwork that relies on the play between naturalistic highlights, midranges, and shadowsImpressionistic-type artwork and other images created for purely personal or aesthetic purposesLogos and other display type featuring soft edges, reflections, or tapering shadows
Special effects that require the use of filters and color enhancements that you simply can't achieve in adrawing program When to use a drawing program
You're probably better off using Illustrator or some other drawing program if you're interested in
creating more stylized artwork, such as the following:
Poster art and other high-contrast graphics that heighten the appearance of reality
Architectural plans, product designs, or other precise line drawings
Business graphics, such as charts and other infographics that reflect data or show how things workTraditional logos and text effects that require crisp, ultrasmooth edges
Brochures, flyers, and other single-page documents that mingle artwork, logos, and body-copy text(such as the text you're reading now)
If you're serious about computer graphics, you should own at least one painting program and onedrawing program If I had to rely exclusively on two graphics applications for producing still, two-dimensional images, I would choose Photoshop and Illustrator Adobe has done a fine job of
establishing symmetry between the two programs so that they share common interface elements andkeyboard shortcuts Learn one and the other makes a lot more sense.Cross-Reference
For those who are interested, I write a cradle-to-grave guide to Illustrator called Real World Illustrator ,
published by Peachpit Press I'm also the host of a handful of video training series, including not only
Total Training for Adobe Illustrator but also Total Training for Adobe Photoshop, both available from Total Training (www.totaltraining.com ).
6.1.2 Fast Track to Photoshop CS
Fast Track to Photoshop CS
Now that we've reviewed the fundamentals, let's turn our attention from the wider world of imageediting to the comparatively narrow realm of Photoshop CS Namely, what hot new features does thisupgrade have to offer? Given that Photoshop's only competition these days is its glorious past, whatdistinguishes Version CS from previous versions of the program?Photoshop
If you're an experienced user of Photoshop, you might think that Version CS isn't a particularly drasticupgrade In many ways, you're right But that doesn't mean that it isn't a worthwhile investment; on thecontrary, a slew of modest but important improvements enable you to work better and faster And likeany upgrade to Photoshop, there's a lot more going on than may at first meet the eye Here I've
compiled a few of the most prominent features that are new to Photoshop CS, in rough order of
importance I also point you to the chapter where you can sniff around for more information:
Improved File Browser ( Chapter 3 ): Introduced in Photoshop 7, the File Browser has really come
into its own in Version CS In addition to the renaming and rotating functions previously available, abunch of batch-processing commands can now be performed directly in the File Browser It alsoboasts higher-quality previews, new organizational techniques, support for keywords, and the capability
to enter and edit an unimaginable amount of image metadata Trust me the improved File Browser is
so impressive, you'll wonder how you ever got by without it
Layer comps ( Chapter 12 ): A great way to store multiple versions of an image in a single file, layer
comps are a low-key but eminently useful new feature in Photoshop CS A layer comp is a snapshot ofthe visibility, position, and styles applied to the layers in an image at a particular moment in time Youcan create layer comps as you work using the Layer Comps palette Later, you can shuffle throughyour layer comps to show a client a variety of different versions of an image After you get the hang ofhow they work, layer comps will become a great resource in your workflow
Trang 28Not anymore Now you can work with layers, text, brushes, and a bunch of filters while keeping thecolor quality of an image as high as possible.
Type on a path ( Chapter 15 ): Although we've long been able to warp text layers while keeping them
fully editable, Photoshop has never provided the means to create and edit text directly on a path Untilnow, that is Using the regular old type tool, you can click any path you've drawn and create text thatflows according to the path's shape You can even use closed shapes as text frames and place
multiple layers of type on a path or shape Although type on a path is a powerful new feature, it can beagonizingly slow when you're working with a complicated path, and kerning can get thrown off
dramatically Consider yourself warned
Customizable keyboard shortcuts ( Appendix ): As is fast becoming the norm among graphics
programs, Photoshop CS now lets you create new keyboard shortcuts and edit existing ones If youfind yourself repeatedly applying a function or command that doesn't have a shortcut by default,
assigning a keyboard equivalent can help you work faster You can even tell Photoshop to generate anHTML summary of all your keyboard shortcuts for easy reference
Shadow/Highlight command ( Chapter 17 ): The new Shadow/Highlight command is a powerful tool
for correcting exposure problems that plague different areas of an image By analyzing specific pixelsand comparing them to the pixels in the surrounding area, the command determines which areas areoverexposed and which fall into the shadows You can then use a variety of settings to adjust both theoverexposed and shadow areas The default settings often do a great job of correcting shadow
problems in an image For example, the command offers a fantastic fix for images shot with an
overexposed background and an underexposed subject
Nested layer sets ( Chapter 12): In Photoshop CS, layer sets can be nested , or placed within one
another This gives you greater control over the organization of layers in an image You can nest layersets up to five levels deep Nested layer sets maintain their structure even when imported into AdobeIllustrator CS
Lens Blur filter ( Chapter 10 ): The type of blur generated by a real-world camera lens can appear
very different from the Gaussian blur created by Photoshop Photoshop CS seeks to correct this byintroducing the new Lens Blur filter, which can generate much more realistic blur effects through a fewsimple settings Lens Blur blurs an image into patterns and artifacts based on a specified iris shape.Specular highlights are preserved just as they are when you push a camera out of focus Additionally,you can set alpha channels and masks as maps that the filter references to decide which areas of theimage get blurred and which remain crisp If this is all Greek to you, never fear Chapter 10 translateseverything into your native language
Filter Gallery ( Chapter 11 ): The Gallery Effects filters themselves haven't changed, but the manner
in which you apply them has been dramatically revamped in Photoshop CS The new Filter Galleryprovides high-quality previews, lets you leap from filter to filter, and even permits you to stack filters ontop of one another to see how they interact The Filter Gallery hasn't improved the results of thesesomewhat middling effects filters, but it sure has made them more fun to play with
Improved Liquify filter ( Chapter 11 ): The Liquify filter has been streamlined and improved to provide
a somewhat more refined image-distorting experience Most importantly, you now have many moreoptions for determining the mask that sets the limits of the command
Match Color ( Chapter 17 ): The mysterious and intelligent Match Color command can save you a lot
of time and effort if you're interested in resolving the color cast of one image to match that of another.This can be useful when you want to composite two similar images together or assemble a consistentlytoned montage or presentation Match Color is even a great tool for correcting differences in lightingconditions between two images The command samples the statistics, or color cast data, of a source
Trang 29image or a selected area and then alters the colors in the destination image to achieve a better match.
Better healing brush ( Chapter 7 ): The innovative healing brush, first introduced in Photoshop 7, now
has the capability to pull pixel information from all visible layers in an image
Color replacement tool ( Chapter 5 ): Borrowing the technology that powers the red-eye brush tool in
Adobe Photoshop Elements, the color replacement tool in Photoshop CS lets you highlight an area ofcolor and replace it with another color Controls for the limits imposed on the tool ensure that your colorchanges stay vibrant, clean, and realistic
PDF Presentation ( Chapter 18 ): You can now generate multipage Adobe PDF files and
automatically updating PDF slideshows using the new PDF Presentation command PDF slideshowsare a great way to share groups of photos with friends or coworkers PDF Presentation is also one ofthe many automated processes that can be accessed directly from the improved File Browser
Photomerge ( Chapter 18 ): First seen in Photoshop Elements, the Photomerge command can stitch
together lengthy, complicated panoramas from a series of images When working with photos thatwere carefully captured with Photomerge in mind, the command can do a remarkable job
Improved Picture Package ( Chapter 18 ): Photoshop CS makes the Picture Package command
more flexible by giving you the ability to create and edit custom photo layouts Starting with an existingtemplate or from scratch, you can add, move, and scale image zones in the Picture Package EditLayout dialog box until you're completely satisfied with the results
Photo Filter ( Chapter 17 ): Using the new Photo Filter command, you can simulate the effect of
putting a colored filter on a camera lens Photo Filter can be great for quickly correcting or adjusting thewhite balance of an image, altering the color temperature, or removing an overall color cast You canalso crank up the settings to create some quick color effects
Crop and Straighten Photos ( Chapter 3 ): If scanning is a regular part of your image-editing routine,
you'll thank your lucky stars for the advent of the Crop and Straighten Photos command A one-click,fully automated process, Crop and Straighten Photos takes a group of images that were scannedtogether and separates them into individual files It recognizes each image, rotates it to compensate forlopsided scanning, and copies it into a new image file
Fibers and Average filters ( Chapters 11 and 10 , respectively): Photoshop CS introduces two new
filters Fibers uses fractals to generate stringy, starchy, naturalistic patterns Think of it as DifferenceClouds stretched out like taffy The Average filter determines the average color of an image or selectedarea and then fills the image or area with that color With most images, applying this filter produces adull, solid grayish wall But there are some practical applications, as we'll see in Chapter 10
Photoshop's companion program, ImageReady CS, also introduces its own share of upgrades Themost prominent of these upgrades is what Adobe calls the new "object-based user interface," whichbasically translates to "ImageReady just got a whole lot easier to use." Many of Photoshop's familiarbehaviors now work in a similar manner in ImageReady CS Adobe has also added a slew of
enhancements (and removed some of the more redundant features) to make ImageReady feel morelike a part of Photoshop and less like a stand-alone program Also notable is ImageReady's newcapability to export to the SWF, or Shockwave Flash, format (As I mentioned in the preface, forcomplete information on creating Web graphics with Photoshop and ImageReady, please refer to the
hardbound edition of this title, Photoshop CS Bible, Professional Edition )
The result is yet another strong upgrade to Photoshop It may not be as flashy as Versions 3, 5, 6, and
7 were, but it's certainly no slouch And if I wish Photoshop CS had perhaps included a few morefeatures such as envelope distortions and After-Effects-style parametric (and thus forever editable)effects I am pleasantly surprised by what it does offer and find little fault with its implementation
Big upgrade or small, as usual the Photoshop Bible is here to help you get the most out of this latest
version of Photoshop Just remember to keep an eye peeled for the Photoshop CS icon, and you'll beover the hump and into the image-editing groove in no time
Chapter 2: Inside Photoshop A First Look at Photoshop CS
Trang 30than you have with most of your friends and family may find yourselves perplexed at times whennegotiating with the latest version The program speaks differently every time it upgrades In fact, it'swrong to think of Photoshop CS as an older, wiser version of its original self This is a completely newbeast, bearing about as much resemblance to Photoshop 1.0 as you bear to a rhesus monkey.
So in this chapter, I introduce to you the latest version of Photoshop, insubordinate child of its
ancestors, spoiler of photographic traditions, and speaker of the new language that you now have tolearn These pages represent a low-level primer you need to ingest before you can utter so much as acoherent "gack!" Granted, it comes to you second hand I am a non-native myself, with my own
peculiar dialect as you'll discover but given that Photoshop CS itself is the only native speaker on theplanet, this foreigner's perspective will have to do The splash screen
Shortly after you launch Photoshop, the splash screen appears The splash screen explains the
launching process by flashing the names of plug-in modules as they load and listing the various
Photoshop After the application is open, re-network the computer, and you'll be up and running Andthe other important thing to note is that with Mac OS X, this network problem doesn't occur TheWelcome ScreenPhotoshop
In Photoshop CS, Adobe has changed the way you access online help and other resources After theinitial splash screen disappears you'll be confronted with the Welcome Screen, shown in Figure 2-1,which provides you with several choices You can view Tutorials, Tips and Tricks, Color ManagementSetup, or a listing of What's New Be aware that most of these options require that you have access tothe Internet If you want to dismiss the screen and go about your business, click the Close button Ifyou want to disable the screen so it does not appear every time you launch the program, turn off theShow This Dialog at Startup check box Either way, you can return to the Welcome Screen at any time
Trang 31by choosing Help ® Welcome Screen.
Figure 2-1: The new Welcome Screen offers a series of support options and other resources forPhotoshop CS.Note
As in previous versions, you can still get to the Adobe Web site by clicking the feather icon at the top ofthe toolbox or by choosing Help ® Photoshop Online
6.2.1 The Photoshop Desktop
The Photoshop Desktop
After the launch process is complete, the Photoshop desktop consumes the foreground Figure 2-2shows the Photoshop CS desktop as it appears on a PC when an image is open and all palettes arevisible Figure 2-3 shows the same scenario as it appears on a Mac running Mac OS
Trang 32Figure 2-3: The Photoshop CS desktop as it looks on a Mac running Mac OS X
Many of the elements that make up the Photoshop desktop are well known to folks familiar with theWindows or Macintosh environments For example, the menu bar provides access to menus andcommands You can drag the title bar to move the image window And the scroll bars let you look athidden portions of the image
Other potentially less familiar elements of the Photoshop desktop work as follows:
Image window: Like any halfway decent product, Photoshop lets you open multiple documents at a
time Each open image resides in its own window On the Mac, click the green zoom button in theupper-left corner of the title bar to resize the window to fit the image
Also worth noting on the Mac are the special boxes in the lower-left corner of the image window (seeFigure 2-3) The magnification box tells you the current view size, and the information box can tell youimportant things about image size and computer resources (To see the information box, you mayneed to increase the horizontal size of your image window by dragging it from the lower-right corner.)
Status bar (Windows only): Just above the Windows taskbar sits Photoshop's status bar, which
provides running commentary on the active tool and image (If the status bar doesn't appear on yourscreen, choose Window ® Status Bar.) The left end of the status bar features the magnification boxand the information box, both of which are described in the preceding paragraph.Cross-Reference For complete information on the magnification box, read the "Navigating in Photoshop" section later inthis chapter The very next section explains the information box
Toolbox: The toolbox icons provide one-click access to the various Photoshop tools To select a tool,
click its icon Then use the tool by clicking or dragging with it inside the image window
The bottom four rows of the toolbox contain controls for changing your paint colors, entering andexiting the quick mask mode, changing the screen area available for image display, and switching toAdobe ImageReady (which ships with Photoshop)
Floating palettes: Photoshop CS offers a total of 16 palettes, two more than Version 7 (This number
excludes the toolbox and the Options bar, which are technically palettes as well It also excludes theFile Browser, which was a palette but is now a window.) Each palette is said to be "floating," whichmeans that it's independent of the image window and of other palettes Palettes can be groupedtogether or dragged apart to float separately according to your tastes For more information on
palettes, see the upcoming section "The floating palettes."
Docking well: The gray bar at the end of the Options bar is the docking well You can drag palettes to
the well to save screen space but still keep the palettes easily accessible For more information, see
Trang 33"Rearranging and docking palettes" later in this chapter.Note
Unfortunately, the docking well is visible only if you use a screen resolution with a horizontal pixeldisplay of more than 800 pixels The information box
The information box is Photoshop's way of passing you a memo marked FYI No biggie, nothing to fretabout, just a little bit of info you might want to know As an unusually obliging piece of software,
Photoshop likes to keep its human masters informed on the latest developments.Document size
By default, the information box contains two numbers divided by a slash The first number is the size ofthe base image in memory The second number takes into account any additional layers in your image.Photoshop calculates the first value by multiplying the height and width of the image (both in pixels) by
the bit depth of the image, which is the size of each pixel in memory Consider a typical, full-color,
640´480-pixel image A full-color image takes up 24 bits of memory per pixel (which is why it's called a24-bit image) There are 8 bits in a byte, so 24 bits translates to 3 bytes Multiply that by the number ofpixels and you get 640 ´ 480 ´ 3 = 921,600 bytes Because there are 1,024 bytes in a kilobyte, 921,600bytes is exactly 900K Try it yourself open a 640´480-pixel RGB image and you'll see that the firstnumber in the information box reads 900K Now you know why
But it's the second value, the one that factors in the layers, that represents the real amount of memorythat Photoshop needs If the image contains one layer only, the numbers before and after the slash arethe same Otherwise, Photoshop measures the opaque pixels in each layer and adds approximately 1byte of overhead per pixel to calculate the transparency The second number also grows to
accommodate paths, masks, spot-color channels, undoable operations, and miscellaneous datarequired by the image cache
Now obviously, it's not necessary that you be able to predict these values (which is lucky, becausepredicting the second value is virtually impossible) Photoshop asks no help when calculating thevalues in the information box and will summarily ignore any help you might care to offer But it's a goodidea to know what's going on as you start piling layers on top of an image The larger the previewnumbers grow, the more work Photoshop has to do and the slower it's likely to perform.Image position
If you want to position a picture precisely on a page before printing, use the Print with Preview
command in the File menu (skip to Chapter 18 for details) To get a rough idea of the current imageposition, however, click and hold on the information box Photoshop displays a pop-up window showingthe size and placement of the image in relation to the paper The preview also shows the approximateplacement of crop marks and other elements requested in the Show More Options section of the Printwith Preview dialog box.Tip
Press Alt (Win) or Option (Mac) and mouse down on the information box to view the size, channels,and resolution of the image
You can also Ctrl-click (z -click on the Mac) the information box to see the tile sizes Photoshop uses
tiles to calculate pixel manipulations If you confine your work to a single tile, it will probably go faster
than if you slop a little over into a second tile But who cares? Unless you're some kind of tile-readingrobot, this technical information is rarely of any practical use
Click the right-pointing arrowhead next to the information box to display a pop-up menu of sevenoptions The first option Document Sizes is selected by default This option displays the image-sizevalues described in the preceding section You can find out what information the other choices provide
in the next few sections.Tip
The prefix displayed before the values in the information box indicates which of the options is active:Doc shows that Document Sizes is selected; Scr, Scratch Sizes; and Eff, Efficiency When the Timing
option is active, an s appears after the numerical value If a tool name appears in the information box,
you know that the final option, Current Tool, is active Similarly, if you see a color profile statement,such as "Untagged RGB," or a couple of measurements, such as "640 pixels ´ 480 pixels," you'relooking at the Document Profile or Document Dimensions setting, respectively.Image color profile
If you work regularly with many different color profiles, you may find the Document Profile option handy.When you select this option, the name of the current color profile appears in the information box
Chapter 16 tells you everything you need to know about color profiles.Document measurementsSimilar to Alt- or Option-clicking the information box, selecting Document Dimensions gives you a quickreadout of the width-by-height measurements of your document The unit of measurement is set in theUnits & Rulers panel of Photoshop's Preferences dialog box.Memory consumption and availabilityWhen you select Scratch Sizes, Photoshop changes the values in the information box to represent
Trang 34If the second value is bigger than the first, all is happiness and Photoshop is running as fast as yourparticular brand of computer permits But if the first value is larger, Photoshop has to dig into its supply
of virtual memory , a disk-bound adjunct to RAM Virtual memory makes Photoshop run more slowly
because the program must swap portions of the image on and off your hard disk The simple fact is,disks have moving parts and RAM does not That means disk-bound "virtual" memory is slower thanreal memory
To increase the size of the value after the slash, you have to get more RAM to your images in one ofthe following ways:
Purchase more RAM Installing an adequate supply of memory is the single best way to make
Photoshop run more quickly
Quit other applications so that only Photoshop is running
Quit Photoshop and remove any filters that you don't need from the Plug-Ins folder (which resides inthe same folder as the Photoshop CS application) Don't throw the filters away, just move them to alocation outside the Plug-Ins folder so they don't load into RAM when you launch Photoshop
Choose Memory & Image Cache in the Preferences submenu and increase the Memory Usage value
as explained later in this chapter.Operating efficiency
When you select the Efficiency option, Photoshop lists the amount of time it spends running operations
in RAM compared with swapping data back and forth between the hard disk A value of 100 percent isthe best-case scenario It means Photoshop never has to rely on scratch files Low values indicatehigher reliance on the hard disk and, as a result, slower operations Adobe recommends that if thevalue falls below 75 percent, you should either assign more memory to Photoshop or purchase moreRAM for your computer
The Efficiency option is a reality check If it seems Photoshop is dragging its feet, and you hear itwriting to your hard disk a little too often, you can refer to the Efficiency rating to see whether
performance is as bad as you suspect Keep in mind, hearing Photoshop occasionally write to disk isnot, in and of itself, cause for concern All versions of Photoshop since 3.0 automatically copy openimages to a disk buffer in case using virtual memory is later warranted In fact, this is the reason Adobeadded the Efficiency option to Version 3.0.1 to quash fears that a few sparks from your hard driveindicated anything less than peak performance.Photoshop operations timing
If you select Timing, the information box tells how long Photoshop took to perform the last operation(including background tasks, such as transferring an image to the system Clipboard) Adobe may haveadded this option to help testing facilities run their Photoshop tests But built-in timing helps you aswell
For example, suppose you're trying to decide whether to purchase a new computer You read a
magazine article detailing the newest super-fast system You can run the same filters with the samesettings on your computer and see how much slower your results are, all without picking up a
stopwatch
At the risk of starting interoffice feuding, the Timing option also provides you with a mechanism fortesting your computer against those of coworkers and friends The Timing option serves as a neutralarbitrator, enabling you and an associate to test identical operations over the phone Like Efficiency,Timing is a reality check If you and your associate own similarly configured computers and yourTiming values are vastly different, something's wrong.The active tool
Choose Current Tool, and Photoshop displays the name of the active tool Why do you need such acondescending option? Surely you're not so far gone that you need Photoshop telling you what youalready know Adobe's intention is not to drum you over the head with redundant information but tooffer a helping hand if you find the tool configuration confusing Also, on the PC, the tool name serves
as a companion to the tool description to the right of it in the status bar Now you see not just what the
Trang 35tool does, but what the tool is.
Still, my guess is that this option will prove as rarely useful to everyday image editing as Timing Use it
if you're having problems when first using Photoshop CS and then set it back to Document Sizes,Scratch Sizes, or Efficiency The original three options continue to be the best The toolsPhotoshop Compared to previous versions, the updates to the toolbox in Photoshop CS are minor In fact, there'sbeen only one change this time around: The new color replacement tool now shares a slot with thehealing brush and patch tools That's it I know it's hard to believe, but there you have it
When multiple tools share a single toolbox slot, you select the tool you want from a menu-style list, asshown in Figure 2-4 A tiny triangle in the lower-right corner of an icon indicates that more tools lurkbeneath the surface You can click the triangle and then click the name of the tool you want to use Or,
to do the job with one less click, just drag from the icon onto the name of the tool and then release the
mouse button
Figure 2-4: Drag from any tool icon with a triangle to display a pop-up menu of alternate tools.Tip You can cycle between the tools in the pop-up menu by Alt-clicking (Win) or Option-clicking (Mac) atool icon Pressing the key that appears to the right of the tool names also does the trick_however,depending on a tool setting that you establish in the Preferences dialog box, you may need to pressShift with the key (See the upcoming section "General preferences.")
Also, when you hover your cursor over a tool, Photoshop tells you the name of the tool and how toselect it from the keyboard If you find the tool tips irritating, turn to "General preferences" to find outhow to turn them off.Note
I've catalogued each tool in the following lengthy list, with tool icons, pithy summaries, and the chapter(if any) to which you can refer for more information No need to read the list word for word; just use it
as a reference to get acquainted with the new program The list presents the tools in the order in whichthey appear in the toolbox Incidentally, unless otherwise noted, each of the following descriptions tellshow to use the tool in the image window For example, if an item says drag, you click the tool's icon toselect the tool and then click and drag in the image window; you don't drag on the tool icon itself
Rectangular marquee ( Chapter 8 ): Drag with this tool to enclose a portion of the image in a
rectangular marquee , which is a pattern of moving dash marks indicating the boundary of a selection.
Shift-drag to add to a selection; Alt-drag (Win) or Option-drag (Mac) to delete from a selection Thesame goes for the other marquee tools, as well as the lassos and magic wand As an alternative tousing these time-honored shortcuts, you can click mode icons in the Options bar to change the
behavior of the selection tools
Elliptical marquee ( Chapter 8 ): Drag with the elliptical marquee tool to enclose a portion of the
window in an oval marquee
Trang 36also Alt-click (Win) or Option-click (Mac) with the lasso to create a straight-sided selection outline.
Polygonal lasso ( Chapter 8 ): Click hither and yon with this tool to draw a straight-sided
selection outline (just like Alt-clicking or Option-clicking with the standard lasso) Each click sets acorner point in the selection
Magnetic lasso ( Chapter 8 ): As you drag with the magnetic lasso tool, the selection outline
automatically sticks to the edge of the foreground image Bear in mind, however, that Photoshop's idea
of an edge may not jibe with yours Like any automated tool, the magnetic lasso sometimes workswonders, and other times it's more trouble than it's worth.Tip
The magnetic lasso automatically lays down points as you drag If you don't like a point and want to getrid of it, press the Backspace (Win) or Delete (Mac) key
Magic wand ( Chapter 8 ): Click with the magic wand tool to select a contiguous area of similarly
colored pixels To select discontiguous areas, click in one area and then Shift-click in another
Deselect the Contiguous tool option and click once to select similar colors throughout the image
Crop ( Chapter 3 ): Drag with the crop tool to enclose the portion of the image you want to retain
in a rectangular boundary Photoshop tints areas outside the boundary to help you better see whichimage areas will go and which will stay when you apply the crop The crop boundary sports severalsquare handles you can drag to resize the cropped area Drag outside the boundary to rotate it; draginside to move it Press Enter or Return to apply the crop or Escape to cancel
Slice: The slice tool and its companion, the slice select tool, come into play when you're creating
Web graphics You can cut images into rectangular sections ? known as slices ? so that you can applyWeb effects, such as links, rollovers, and animations, to different areas of the same image Drag withthe slice tool to define the area that you want to turn into a slice
Slice select: If you don't get the boundary of your slice right the first time, click the slice with this
tool and then drag one of the side or corner handles that appear Or drag inside the boundary to
relocate it
Press Ctrl (Win) or z (Mac) when the slice tool is active to temporarily access the slice select tool, andvice versa
Healing brush ( Chapter 7 ): The clone stamp tool (also known to longtime Photoshop users as
the rubber stamp tool) has always seemed like a miracle worker when removing unwanted elementsfrom images Although excellent results were possible, you still had to be careful that the texture andshading of the cloned area matched the area you were replacing Although the healing brush toolseems at first use just like the clone stamp tool, its special "healing" process lets you clone details fromone area without obscuring the texture and shading of the other
Patch ( Chapter 7 ): Similar to the healing brush, the patch tool lets you use the same "healing"
technology by making selections and dragging them to new locations It's generally useful for healinglarger areas of the image.Photoshop
Color replacement ( Chapter 5 ): Hailing from Photoshop's younger sibling, Photoshop Elements,
the new color replacement tool lets you paint over an existing color in the image to replace it with theforeground color Its main reason for existence is to make it easy to fix red-eye
Trang 37Brush ( Chapter 5 ): Drag with the brush tool to paint soft lines If you're thinking that sounds kind
of dull, wait until you learn about the multitude of settings available to you in the Brushes palette
Pencil ( Chapter 5 ): Drag with the pencil tool to paint jagged, hard-edged lines Its main purpose
is to clean up individual pixels when you're feeling fussy
Clone stamp ( Chapter 7 ): This tool copies one portion of the image onto another Alt-click (Win)
or Option-click (Mac) the part of your image you want to clone, and then drag to clone that area toanother portion of the image
Pattern stamp: The pattern stamp tool lets you paint with a pattern Either choose a preset or
define your own pattern using Edit ® Define Pattern and then paint away
History brush ( Chapter 7 ): The history brush reverts portions of the image to any of a handful of
previous states throughout the recent history of the image To specify the state that you want to revert
to, click in the first column of the History palette It's like an undo brush but way, way better
Art history brush ( Chapter 7 ): Like the history brush, the art history brush paints with pixels
from a previous image state But with this brush, you get a variety of brush options that create differentartistic effects
Eraser ( Chapter 7 ): Drag with the eraser tool to paint in the background color or erase areas in
a layer to reveal the layers below Alt-drag (Win) or Option-drag (Mac) to switch to the Erase to Historymode, which reverts the image to a previous state just as if you were using the history brush
Background eraser ( Chapter 9 ): The background eraser rubs away the background from an
image as you drag along the border between the background and foreground If you don't wield thistool carefully, though, you wind up erasing both background and foreground
Magic eraser ( Chapter 9 ): The magic eraser came from the same gene pool that produced the
magic wand When you click with the magic wand, Photoshop selects a range of similarly coloredpixels; click with the magic eraser, and you erase instead of select
Gradient ( Chapter 6 ): Drag with this tool to fill a selection with a gradual transition of colors,
commonly called a gradient You can click the gradient icon in the toolbox and select a gradient style
from the Options bar
Paint bucket ( Chapter 6 ): Click with the paint bucket tool to fill a contiguous area of similarly
colored pixels with the foreground color or a predefined pattern
Blur ( Chapter 5 ): Drag with the blur tool to diffuse the contrast between neighboring pixels,
which blurs the focus of the image You can also Alt-drag (Win) or Option-drag (Mac) to sharpen theimage
Sharpen ( Chapter 5 ): Drag with this tool to increase the contrast between pixels, which
sharpens the focus Alt-drag (Win) or Option-drag (Mac) when this tool is active to blur the image
Smudge ( Chapter 5 ): The smudge tool works just as its name implies; drag with the tool to
smear colors inside the image
Dodge ( Chapter 5 ): Drag with the dodge tool to lighten pixels in the image Alt-drag (Win) or
Option-drag (Mac) to darken the image
Burn ( Chapter 5 ): Drag with the burn tool to darken pixels Press Alt (Win) or Option (Mac) to
temporarily access the dodge tool and lighten pixels
Sponge ( Chapter 5 ): Drag with the sponge tool to decrease the amount of saturation in an
image so the colors appear more drab and eventually gray You can also increase color saturation by
Trang 38except that your text is oriented vertically in the image.
Horizontal type mask ( Chapter 15 ): As you might expect, this tool creates horizontal type The
twist is that the type appears not directly in the image but rather as a mask, with an active selectionaround the shapes of the letters
Vertical type mask ( Chapter 15 ): Combine the verticality of the vertical type tool with the
maskiness of the horizontal type mask tool, and you have what else? the vertical type mask tool Use
it to create an active selection of vertically oriented text
Pen ( Chapter 8 ): Click and drag with the pen tool to set points in the image window Photoshop
draws an editable path outline much like a path in Illustrator that you can convert to a selectionoutline or stroke with color
Freeform pen ( Chapter 8 ): Drag with this tool to draw freehand paths or vector masks.
Photoshop automatically adds points along the path as it sees fit If you select the Magnetic check box
in the Options bar, the freeform pen morphs into the magnetic pen Deselect the check box to return tothe freeform pen
Add anchor point ( Chapter 8 ): To insert a point in a path, click a path segment with this tool Delete anchor point ( Chapter 8 ): Click a point to remove it without interrupting the outline of the
path Photoshop automatically draws a new segment between the neighboring points
Convert point ( Chapter 8 ): Points in a path come in different varieties, some indicating corners
and others indicating smooth arcs The convert point tool enables you to change one kind of point toanother Drag a point to convert it from a corner to an arc Click a point to convert it from an arc to asharp corner
Rectangle ( Chapter 14 ): One of the five vector drawing tools, this tool draws rectangles filled
with the foreground color Just drag to create a rectangle; Shift-drag to draw a square
Rounded rectangle ( Chapter 14 ): Prefer your boxes with nice, curved corners instead of sharp,
90-degree angles? Drag or Shift-drag with the rounded rectangle tool.Cross-Reference
You can opt to create rasterized shapes and lines with the rectangle, rounded rectangle, ellipse,
polygon, line, and custom shape tools See Chapter 14 for details
Ellipse ( Chapter 14 ): You look pretty smart to me, so you probably already figured out that you
drag with this tool to draw an ellipse and Shift-drag to draw a circle
Polygon ( Chapter 14 ): By default, dragging with this tool creates a five-sided polygon Controls
available in the Options bar enable you to change the number of sides or set the tool to create starshapes
Line ( Chapter 14 ): Drag with the line tool to create a straight line But before you do, travel to the
Options bar to set the line thickness and specify whether you want arrowheads at the ends of the line
Custom shape ( Chapter 14 ): After you draw a shape with one of the other drawing tools, you
can save it as a custom shape Thereafter, you can recreate that shape by selecting it from the
Trang 39Options bar and then dragging with the custom shape tool You also can choose from a variety ofpredefined shapes when working with the custom shape tool.
Notes ( Chapter 3 ): Use this tool to create a little sticky note on which you can jot down thoughts,
ideas, and other pertinent info that you want to share with other people who work with the image orthat you simply want to remember the next time you open the image After you create the note,
Photoshop displays a note icon in the image window; double-click the icon to see what you had to say
Audio annotation ( Chapter 3 ): If you prefer the spoken word to the written one, you can
annotate your images with an audio clip, assuming that you have a microphone and sound card foryour computer As with the notes tool, an audio icon appears in the image window after you record yourmessage Clicking the icon plays the audio clip
Eyedropper ( Chapter 4 ): Click with the eyedropper tool on a color in the image window to make
that color the foreground color Alt-click (Win) or Option-click (Mac) a color to make that color thebackground color
Color sampler ( Chapter 4 ): Click as many as four locations in an image to evaluate the colors
of those pixels in the Info palette After you set a point, you can move it by dragging it to a differentpixel
Measure ( Chapter 12 ): The measure tool lets you measure distances and directions inside the
image window Just drag from one point to another and note the measurement data in the Info palette
or the Options bar You can also drag the endpoints of your line to take new measurements And byAlt-dragging (Win) or Option-dragging (Mac) an endpoint, you can create a sort of virtual protractor thatmeasures angles
Hand (Chapter 2): Drag inside the image window with the hand tool to scroll the window so you
can see a different portion of the image Double-click the hand tool icon to magnify or reduce theimage so it fits on the screen in its entirety When the hand tool is active, you can click buttons in theOptions bar to display the image at the actual-pixels, fit-on-screen, or print-size view sizes
Zoom (Chapter 2): Click with the zoom tool to magnify the image so you can see individual
pixels more clearly Alt-click (Win) or Option-click (Mac) to step back from the image and take in abroader view Drag to enclose the specific portion of the image you want to magnify And finally,double-click the zoom tool icon inside the toolbox to restore the image to 100-percent view size.You can modify the performance of any tool but the measure tool by adjusting the settings in theOptions bar To change the unit of measurement used by the measure tool, double-click the ruler orchoose Edit ® Preferences ® Units & Rulers (Photoshop ® Preferences ® Units & Rulers in Mac OSX) to display the Units & Rulers panel of the Preferences dialog box Then select the unit from theRulers pop-up menu Or even quicker, right-click (Win) or Control-click (Mac) the ruler or click the plussign in the lower-left corner of the Info palette and select a measurement unit from the resulting pop-upmenu The toolbox controls
Well, that pretty much wraps it up for the Photoshop CS tools It was a breathtakingly dull tale, but onethat had to be told The excitement isn't over yet, though Gather the kittens and hold onto your mittens
as we explore the ten controls that grace the lower portion of the toolbox:
Foreground color: Click the foreground color icon to bring up the Color Picker dialog box.
Select a color and press Enter or Return to change the foreground color, which is used by the pencil,paintbrush, airbrush, gradient, and shape tools.Note
I'm not sure why, but many users make the mistake of double-clicking the foreground or backgroundcolor icons when they first start using Photoshop A single click is all that's needed Experienced usersdon't even bother with the Color Picker they stick to the more convenient Color palette
Background color: Click the background color icon to display the Color Picker and change the
background color, which is used by the eraser and gradient tools Photoshop also uses the background
Trang 40masked portions of the image Paint with black to extend the masked areas, thereby subtracting fromthe selection Paint with white to erase the mask, thereby adding to the selection.Cross-Reference The quick mask mode is too complex a topic to sum up in a few sentences If you can't wait to find outwhat it's all about, check out Chapter 9.
Standard window: Click this icon to display the foreground image in a standard window, as shown
earlier in Figures 2-2 and 2-3 Every image appears in the standard window mode when you first openit
Full screen with menu bar: If you can't see enough of your image inside a standard window, click
this icon The title bar and scroll bars disappear, as do all background windows and the Windowstaskbar, but the menu bar and palettes remain visible, as shown in Figure 2-5 (You can still accessother open images by choosing their names from the Window menu.) A light gray background fills any
empty area around the image
Figure 2-5: Click the middle icon at the bottom of the toolbox to hide the title bar and scroll bars.Note This is similar to the effect that you get when you click the maximize button in the upper-right corner ofthe image window on a PC However, you probably want to avoid maximizing images; use the toolboxcontrols instead Photoshop has a habit of resizing a maximized window whenever you zoom with thecommands on the View menu If you use the toolbox controls, you don't have that problem.Tip
When the image doesn't consume the entire image window, the empty portion of the window appearsgray when you're working in the standard window mode or the full screen with menu bar mode Tochange the gray area to a different color such as black select a color and Shift-click in the gray areawith the paint bucket tool
Absolute full screen: If you still can't see enough of your image, click the rightmost of the image
window controls to see the photo set against a neutral black background (You can't change the color
of this backdrop it's always black.) The menu bar disappears, limiting your access to commands, butyou can still access many commands using keyboard shortcuts Only the toolbox and palettes remain