If you set your recording to open in Quicktime, you can use its's basic editing tools. Screenshot does not include editing tools, so you will need to trim the start and end if necessary. To stop recording, press CMD + CTRL + ESC or click on the recording icon in the menu bar. A recording icon appears in the menu bar at the top-right of your screen. Press the record button when you are ready. Then select the option to record the whole screen, or part of the screen (and position the selected area as required). You can find Screenshot through Spotlight search (CMD + space, then type Screenshot).
Then we will look at how to add your webcam. Let's start with basic screen and audio recording. However, adding the picture of you speaking from your webcam requires an extra trick using another built-in application.
It can be used to record whatever is on your screen (including a slide show), as well as audio from the computer or your mic.
Screenshot is one of the Mac's most useful features. But every Mac with a recent version of MacOS has Screenshot built-in. More sophisticated tools are available (Screenflow is the best, at about £80). Mac computers have an easy to use, but effective, screen recording tool built-in, called Screenshot.