The Mac has a feature similar to the “print screen” on a Windows machine. There are several different options for taking screenshots on a Mac. You can use the keyboard shortcuts listed below, or use the Grab program located in the Utilities folder.
Take a picture of the entire screen: Command (⌘)-Shift-3
Take a picture of part of the screen: Command (⌘)-Shift-4. Drag the crosshairs to select the area. The picture is taken when you release the mouse button.
The pictures will be on your desktop as a png file. To read how to take pictures of windows and menus, click here: http://tinyurl.com/6bedma