Command-shift-3 is the basic keyboard shortcut to screen capture on a Mac, but Griffin also shows how to use keystrokes to copy and paste the screen, set a selected area for a screenshot, and to screengrab one window. The screen capture command is also known as screencap, screenshot, screengrab or print screen. KEYBOARD SHORTCUTS: Capture the entire screen; save an image file on desktop: Command-shift-3 Capture the entire screen; copy to the clipboard to paste: Command-control-shift-3 Choose