... computer.Viewing this user guide on iPhone You can view the iPhone User Guide on iPhone in Safari, and in the free iBooks app.View the user guide in Safari: Tap , then tap the iPhone User Guide bookmark. ... is locked. iPhone User Guide For iOS 6 Software Chapter 3 Basics 20Adjusting brightnessYou can manually adjust the brightness of the screen, or turn on Auto-Brightness to have iPhone use ... iBooks, open App Store, then search for and install “iBooks.” Open iBooks and tap Store. Search for iPhone User, ” then select and download the guide. For more information about iBooks, see Chapter...