Update with your book title 41Using the DisplayDisplay PropertiesAdjusting BrightnessWhen a Dell™ computer is running on battery power, you can conserve power by setting the displaybrightness to the lowest comfortable setting by pressing and the up- or down-arrow key onthe keyboard.NOTE: Brightness key combinations only affect the display on your portable computer, not monitors orprojectors that you attach to your portable computer or docking device. If your computer is connected to anexternal monitor and you try to change the brightness level, the Brightness Meter may appear, but thebrightness 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 anexternal monitor).• Press and the down-arrow key to decrease brightness on the integrated display only (not onan external monitor).Switching the Video ImageWhen 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, the external device only, orthe display and the external device simultaneously.Display Resolution and Refresh RateNOTE: If you change the display resolution from the current settings, the image may appear blurry ortext may be hard to read if you change the resolution to one not supported by your computer and display.Before you change any of the display settings, make a note of the current settings so you can change back tothe previous settings if you need to.You can enhance the legibility of text and change the appearance of images on the screen byadjusting display resolution. As you increase resolution, items appear smaller on the screen. Incontrast, lower resolution causes text and images to appear larger and can benefit people with visionimpairments. To display a program at a specific resolution, both the video card and the display mustsupport the program, and the necessary video drivers must be installed.
