How to Put an Apple Computer on a Projector Screen

Power on the projector according to the manufacturer's instructions.
Plug the projector's video cable (VGA or DVI) into the matching port on the Apple computer. The display should automatically appear on the projection screen.
Click the 'Apple' menu, if the projector does not automatically detect the connection. Select 'System Preferences.'
Click 'Displays.' Select 'Arrangement.'
Click a check mark next to 'Mirror Displays.'
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