Dell XPS M1730 (M1730, Late 2007) - Manual (Page 39)

Using the Display
39
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 setting by pressing
and the up- or down-arrow key on the keyboard.
NOTE:
Brightness key combinations only affect the display on your portable
computer, not monitors or projectors that you attach to your portable computer.
If your computer is connected to an external monitor and you try to change the
brightness level, the Brightness Meter may appear, but the brightness level on the
external device does not change.
You can press the following keys to adjust display brightness:
• Press and the up-arrow key to increase brightness on the integrated
display only (not on an external monitor).
• Press and the down-arrow key to decrease brightness on the
integrated display only (not on an external monitor).
Using a Projector
When you start the computer with an external device (such as an external
monitor or projector) attached and turned on, the image may appear on
either the computer display or the external device.
Press to switch the video image between the display only or the
external device only.
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