Using The Display; Adjusting Brightness; Switching The Video Image From Your Computer Display To A Projector - Dell 500 Owner's Manual

Using the Display

Adjusting Brightness

When a Dell™ computer is running on battery power, you can conserve power
by setting the display brightness to the lowest comfortable level.
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Switching the Video Image From Your Computer
Display To a Projector
When you start the computer with an external device attached (such as an
external monitor or projector) and turned on, the image may appear on either
the computer display or the external device.
Press <Fn><F8> to switch the video image between the display only, the
external device only, or the display and the external device simultaneously.
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Press <Fn> and the up-arrow key to increase brightness on the integrated
display only (not on an external monitor).
Press <Fn> and the down-arrow key to decrease brightness on the
integrated display only (not on an external monitor).
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Using the Display
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