for macs:
- Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
- Press the Print Screen key on your keyboard. It may be labeled [PrtScn].
- Open an image editing program, such as Microsoft Paint.
- Go to the Edit menu and choose Paste.
- If prompted to enlarge the image, choose Yes.
- Go to the File Menu and choose Save As.
- Navigate to the folder where you want to save the image.
- Type a file name for the image.
- Select a file type.
- Click the Save button.
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