How to Take a Screenshot in macOS Mojave and Catalina
The Screenshot tool in macOS Mojave delivered new on-screen controls for easy access to every screenshot option and new video recording capabilities. That continues with macOS Catalina. On a desktop Mac, press Command-Shift-5 to summon the screen capture window. Choose from Capture Entire Screen, Capture Selected Windows, or Capture Selected Portion to select and capture a portion of the screen. ...