How to Request Control in Microsoft Teams

Open Microsoft Teams and join a meeting.

After the presenter has shared the contents of their screen, click the "Request control" button in the toolbar at the top of the screen.

Click "Request" in the pop-up window and wait for the presenter's permission.

After getting permission from the presenter, you can control the shared screen to do what you want. When you are done, you can click "Stop control" to withdraw control from the presenter.