Adjusting Brightness
WhenaDell™computerisrunningonbatterypower,youcanconservepowerbysettingthebrightnesstothelowestcomfortablesettingbypressing<Fn>
and the up- or down-arrow key on the keyboard.
You can press the following keys to adjust display brightness:
l Press <Fn> and the up-arrow key to increase brightness on the integrated display only (not on an external monitor).
l Press <Fn> and the down-arrow key to decrease brightness on the integrated display only (not on an external monitor).
Switching the Video Image
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 <Fn><F8> to switch the video image between the display only, the external device only, or the display and the external device simultaneously. Highlight
your display choice and the display is selected when you release the keys.
Setting Display Resolution and Refresh Rate
To display a program at a specific resolution, both the graphics card and the display must support the program, and the necessary video drivers must be
installed.
If you choose a resolution or color palette that is higher than the display supports, the settings adjust automatically to the closest supported values.
1. Click Start® Control Panel® Display.
2. In the Display Properties window, click the Settings tab.
3. Try different settings for Color quality and Screen resolution.
If the video resolution setting is higher than that supported by the display, the computer enters pan mode. In pan mode, the entire screen cannot be
displayed at one time. For example, the taskbar that usually appears at the bottom of the desktop may no longer be visible. To view the rest of the screen,
use the touch pad to pan up, down, left, and right.
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.