How to Adjust the Brightness on a Dell Laptop
The screen of a laptop computer is typically one of the most battery-draining components. People demand bright screens that are readable in most lighting conditions and laptop manufacturers strive to deliver. Dell's laptops are no exception. However, like most manufacturers, Dell provides a way for you to adjust the brightness of your laptop screen, allowing you to dim the display to conserve battery power when needed. Additionally, you can change the screen brightness in Windows if you want the computer to dim the screen automatically when the computer is disconnected from a power outlet.
Changing Brightness with the Keyboard
Press and hold the blue "Fn" key in the bottom-left corner of the laptop keyboard.
Press the up-arrow key—also marked with a blue sun-shaped icon—while holding the "Fn" key to increase the brightness.
Press the down-arrow key while holding the "Fn" key to decrease the brightness.
Release the "Fn" key.
Adjustments for Windows Vista and 7
Click the "Start" button and then click "Control Panel."
Click "Classic View" in Windows Vista or "View by: Small icons" in Windows 7.
Double-click the "Power Options" icon.
Click the "Change plan settings" link under the currently selected power plan, marked by a highlighted radio button.
Use the two slider bars to adjust the desired brightness of the laptop screen for when the computer is plugged in and running on battery power.
Click the "Save Changes" button.