Using the Display 39Using the DisplayAdjusting BrightnessWhen a Dell™ computer is running on battery power, you can conserve powerby setting the display brightness to the lowest comfortable level.• Press and the up-arrow key to increase brightness on the integrateddisplay only (not on an external monitor).• Press and the down-arrow key to decrease brightness on theintegrated display only (not on an external monitor).NOTE: Brightness key combinations only affect the display on your portablecomputer, not monitors or projectors that you attach to your portable computer ordocking device. If your computer is connected to an external monitor and you try tochange the brightness level, the Brightness Meter may appear, but the brightnesslevel on the external device does not change.Switching the Video Image From Your ComputerDisplay To a ProjectorWhen you start the computer with an external device attached (such as anexternal monitor or projector) and turned on, the image may appear on eitherthe computer display or the external device.Press to switch the video image between the display only, theexternal device only, or the display and the external device simultaneously.Setting Display Resolution and Refresh RateNOTE: If you change the display resolution from the current settings, the imagemay appear blurry or text may be hard to read if you change the resolution to onenot supported by your computer and display. Before you change any of the displaysettings, make a note of the current settings so you can change back to theprevious settings if needed.
