Use this instructions to change the duration of the touch key backlight on your Samsung Galaxy S2.
When you are using the touch key backlight, it lits up and illuminate so you could see the key properly. However you may feel the backlight is staying on for too long, and you want to change this time duration. Here's how:
1. Press the Home key.
2. Select Menu key.
3. Tap on Settings.
4. Then choose Display.
5. Select Touch key light duration, and make the neccessary changes.
You can save battery power by setting a shorter time duration.