Print screen in Mac OSX

Fullscreen:

- Hold down Apple key ⌘ + Shift + 3 and release all
- Mouse click on screen

Portion of screen:

- Hold down Apple key ⌘ + Shift + 4 and release all key
- Drag mouse to select portion of screen to capture

From http://www.techiecorner.com/138/how-to-do-print-screen-in-mac-os-x/