It's important to be certain your keyboard backlighting is turned on before you begin. (Don't worry, there are a number of ways to ensure this.) Let's check the box next to your Dell computer's Function keys. (The same box will do for laptops that don't have separate Function keys.) If the box isn't checked, the next time you turn your computer on, you'll see only the text you typed before you turned off the keyboard backlighting, rather than being able to see the keyboard keys.
If it is checked, you'll see a labeling on the box for the F5 key, which will tell you "Increase brightness of keyboard backlighting". If you can't see this labeling, it means you haven't turned on the backlighting, and you'll need to do so. Follow the instructions that come with your specific computer model to turn on the backlighting.
Propagate: The "Propagate" option operates like a toggle switch. If "Propagate" is located on, the backlit keys will light up when you press keys on the keyboard. If "Propagate" is moved off, the backlights will turn off when you press those keys.
Delay: Adjust the "Delay" setting to a longer period of time before the backlit keys turn back on. A long delay will conserve battery power, while a short delay (or not having the delay set at all) can make finding the keys much more difficult in dark conditions. This setting can be changed in the second step.
Red: With this option, the keyboard backlight will only turn off when you press the Delete key on the keyboard. (You have to press the Delete key in order to turn off a key that's illuminated.) If you switch the "Propagate" option off, then you will have to press the Delete key to turn off the backlight. d2c66b5586