How do I take and then copy a screen shot on my Mac Desktop

Press the Shift, Command, and 3 keys to capture the whole screen.

Press the Shift, Command, and 4 keys to capture a draggable part of the screen, or follow it with the spacebar to capture a window.

Combine either of the above with the Control key to put the screenshot onto the clipboard instead of the desktop.

If you captured it to a file, open the file and copy the content. If you captured it to the clipboard, paste the contents into the desired location.

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