On Windows 10, the user can find a quick brightness adjusting slider in the Action Center. This method is also helpful when using a tablet or when you have to do it in software. This method is especially useful for those users whose keyboards have some problems like broken keys, faulty drivers, etc. If you want you can also change Windows 10 display brightness from within the system also. Press the keys, as they are function keys, you have to press and hold the Fn key which is located at the bottom-left corner of the keyboard, while pressing the function keys. To change your screen brightness look for a function key that resembles the icon that represents brightness, mostly it’s a sun or something like that. In most of laptop keyboards, you can find the option of increasing or decreasing brightness quickly by using the function keys (f1 to f12)- that appears on the top of number keys on your keyboard. How to Automatically Adjust Brightness by Using Ambient Light Sensor How to change brightness in Windows 10 Laptop or PC
