Taking screenshot with OS X
The following shortcuts can be used to take screenshots with OS X.
Take a screenshot of the full screen and save it as a PNG file on the desktop CMD+Shift+3
Select a specific part of your screen to take a screenshot. The picture is saved as a PNG on your desktop CMD+Shift+4
Click on a window to make a screenshot of this particularly window. The picture is saved as a PNG on your desktop CMD+Shift+4 space click