Select a , then do one of the following:
Share your screen: Choose Invite to Share My Screen.
View your friend’s screen: Choose Ask to Share Screen.
When the screen-sharing request is accepted, an audio call begins automatically (so you can talk while you work) and the Screen Sharing app in the in the menu bar, then choose “Allow [name] to control my screen” to remove the checkmark.
If you donʼt give someone screen control, they can still click to highlight areas on your screen.