Using Your Computer While Also Projecting A Movie In Class
1. Connect computer to projector (via Apple TV or via cable)
2. Go to System Preferences/Displays/Arrangement tab and UNCHECK “Mirror Displays”.
3. The projector is now a separate display from your computer, and you can drag and drop things onto it. Move your cursor across the RIGHT-HAND edge of your computer’s display and you’ll see it appear on the projector.
4. Launch your movie and drag it from your computer to the projector.
5. You can go full screen with it to fill the whole projector image.
6. Now move your cursor back to your computer’s screen (across LEFT-HAND edge). You can work there without students seeing what you are doing.