When you're in a classroom or conference room and need to project, connect your PC using one of the cable connectors in the room, press the Windows logo key + P, and then choose one of the four options:
· PC screen only. You'll see everything on your PC. (When you're connected to a wireless projector, this option changes to Disconnect.)
· Duplicate. You'll see the same things on both screens.
· Extend. You'll see everything across both screens, and you can drag and move items between the two.
· Second screen only. You'll see everything on the connected screen. The other screen will be blank.