How to take a screenshot? - Macintosh

1. To take a screenshot, press and hold these three keys together: Shift, Command, and 3. 
2. If you see a thumbnail in the corner of your screen, click it to edit the screenshot. Or wait for the screenshot to save to your desktop.
   
   Note: In macOS Mojave or later, you can change the default location of saved screenshots from the Options menu in the Screenshot app. You can also drag the thumbnail to a folder or document.