Hey Clarissa

Thank you for posting in the Lucid Community! To take a screenshot on a MacOS you will want to use the keyboard shortcut Cmmd+Control+3; on Windows you can take a screenshot using the Print Screen key. You can also use the Snipping Tool if you have a mouse and a keyboard: Press Windows logo key + Shift + S. The desktop will darken while you select an area for your screenshot.

Hope this helps--please let me know if you have any additional questions!