There are different ways to change the screen brightness, but the easiest way is to use the function keys. PCs of different brands have different function keys to control screen brightness. In this ...

The Fn key is also known as the function key, and on Windows and most Mac keyboards, you'll find it located in the bottom-left corner of your keyboard.

If you need to use your F keys on your laptop for an app or game but it isn't working, there are a few solutions you can use to make life easier.