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Using the Display 47
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Using the Display
Adjusting Brightness
When a Dell™ computer is running on battery power, you can conserve power by setting the
brightness to the lowest comfortable setting by pressing <Fn> 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 or docking device. 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 <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).
Using the Ambient Light Sensor
The ambient light sensor is located on the bottom of the computer display panel. The ambient
light sensor detects available environmental light and automatically increases or decreases the
display backlighting to compensate for low-light and high-light environments.
You can enable or disable the ambient light sensor by pressing the <Fn> and left-arrow key
combination.
NOTE: Do not cover the ambient light sensor with any adhesive labels. If covered up, the ambient light
sensor automatically sets the display brightness to the minimum level.