Many laptop keyboards include backlit keys. These keyboards are ideal for laptop users who find themselves using their machines in dark places where seeing the keys can become problematic. The process for turning on and off such backlights are similar across all keyboard and computer brands.
Move your cursor over the battery icon in the system tray that can be found in the bottom-left corner of your screen.
Right-click on the icon to bring up a selection of options.
Move down the list and select the "Windows Mobility Center" option.
Click on the keyboard icon to open up a selection of options.
Click "On" under the "Keyboard Lighting" option. Click "OK" to confirm the action.
Hold down the "Function" key on your keyboard and then press the right arrow key to increase the strength of your keyboard's backlight.
Mac laptop users can press the "F8" button on their keyboard to switch on the keyboard's backlight. You must be in a darkened area for the backlight to work on the Mac in the first place because of the computer's automatic light-sensing hardware.