Here are three basic methods to get a screen capture using Mac keyboard shortcuts. You can use a fourth method if you still have an older MacBook Pro with the Touch Bar. MacOS also gives...
Just press Command (⌘) + Shift + 3 for the full screen or Command (⌘) + Shift + 4 to capture a portion. You can also open the Screenshot Toolbar for more options.
Here's how to take a screenshot on a Mac using keyboard shortcuts, Screenshot app, or Grab Utility tool. To take a screenshot of your entire screen, press Command - Shift - 3 at the same time. To capture a portion of the screen, press Command - Shift