How to take a screenshot

1. Step 1
   The Entire Screen:

   Hold down the Command and Shift Keys, and while still holding them, press the number 3.
2. Step 2
   A selection of the screen:

   It's just like the previous step, but replace 3 with 4.

   The cursor will change into a set of crosshairs. Simply select the area you would like to take a screenshot of, and release the mouse.

   If you would like to cancel the screenshot, press escape before making your selection.
3. Step 3
   A single window:

   To get a screenshot of a full window, follow the step above, but instead of selecting an area with the mouse, press the space bar. The cursor will turn into a camera icon, and the window underneath will have a light blue overlay. Click to capture the window, or press space again to change selection modes.
4. Step 4
   Extra credit: Copy to your clipboard

   You can modify any of the previous commands to put the screenshot in your clipboard (so you can paste it) instead of a file. Just perform the same instructions, but add the Control button. So you will hold Command-Control-Shift and the number.
5. Step 5
   Extra credit: Timed screenshots, and recording the mouse

   If you need to do something more advanced, you can use a built in utility called "Grab," located it /Applications/Utilities. Grab gives you some additional options like waiting 10 seconds before performing the screenshot.

Screenshot, Screen Capture  

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Created by Zef