How to change the keyboard brightness on a Chromebook
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A lot of Chromebooks now come with a backlight for the keyboard. This is a great function because it makes typing on your Chromebook much easier when the natural light around you is too low.
Just like the brightness of your display, the backlight for your keyboard can also be adjusted. This is an excellent way of increasing the brightness when needed. It also means you can reduce the brightness when it’s not needed to help save your battery life.
Changing the keyboard brightness is easy to do and remember, so you can easily get into the habit of adjusting the brightness of your Chromebook keyboard to suit your surroundings.
You can change the keyboard brightness by holding down the Alt key and using the same keys you would use to adjust the brightness of your display.