To take control back, select Take back control. While you’re sharing control, they can make selections, edits, and other modifications to the shared screen.
Teams sends a notification to that person to let them know you’re sharing control. Select the name of the person you want to give control to. On the sharing toolbar, select Give control. We've taken steps to prevent this but haven't tested every possible system customization. People you give control to may send commands that could affect your system or other apps. Note: When you’re sharing an app, only give control to people you trust.