Map Backlight to Hardware button

[Mike1002]

Hi, im wondering if there is an easy way for me to map say the maximum setting of my backlight to a hardware button.

I want to be able to change the backlight quickly, if i go outside or something, sometimes i cant see my screen properly to get into the settings to change the backlight.

Even better wolution would be - being able to use my volume slider to set thte backlight when a certain button is pressed at the same time.

Anything like this, or not?

Cheers for any help, Mike.