Macs have a ton of different options when it comes to taking screen shots of what you are working on. They are all pretty simple and can be used at different times, depending on your objective.
How to capture a shot of your entire screen
To take a photo of your entire desktop screen, regardless of what you have up, just press the Command Key (⌘) the Shift key then the 3, all at the same time. The screenshot will be automatically added to your desktop.
How to capture a shot of something specific on your screen
If you want to take a specific picture, you have to select the screen shot option that allows you to highlight what you want to capture.
To do this, press Command (⌘) then Shift then 4. Your mouse will turn into a crosshair pointer. Drag the pointer to select the area that you want to capture.
If you want to resize the area you are capturing with the screen shot, hold Shift, Option, or the Space bar while you drag the pointer across the selection area.
How to capture a specific window
If you have a web browser open and want to capture the entire window, press Command (⌘), then Shift, then 4. Next, press the Space bar, which will turn your mouse into a camera pointer. Drag the pointer over the window you want to capture to highlight it, and then click your mouse.
Brittney Burns, SiteDart Author