... revelations 27 Resolving image resolution 28File Formats: Which Do You Need? 36Formats for digital photos 37 Formats for Web graphics 39Formats for commercial printing 40Formats for PowerPoint ... 3 272 58-ftoc.qxp 8/20/08 2:40 PM Page xiiixiv Photoshop CS4 For Dummies Chapter 17: Introducing Photoshop CS4 Extended . . . . . . . . . . . . . . . . . . . . .3 57 Understanding Photoshop CS4 ... 46256, (3 17) 572 -34 47, fax (3 17) 572 -4355, or online athttp://www.wiley.com/go/permissions.Trademarks: Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for theRest...