Howto Turn On Menu and Back Button Lights on Samsung S3

The Samsung S3 is a clever device to conserve energy, but to some users who keep forgetting where is the frequently invisible "Menu" and "Back" buttons, they should have it lit all the time (and off when screen is off).

These buttons are on the left (Menu) and right (Back) of the Home button. By default, each time either keys are pressed, the lights will stay lit for about 1.5 seconds only.

Here are step to have "Menu" and "Back" buttons lit all the time (and off when screen is off).

Step 1. At the Home screen, go to settings.
Simple? For the unacquainted, just touch the Apps button (usually the centre circle at bottom of the screen) and choose settings.

Step 2. Choose "My device", scroll down and touch "Display". 

Step 3. Scroll down to touch "Touch key light duration".

 Step 4. Choose "Always on".

Press "Home" and you will notice the lights are lit next to the "Home" key. If the screen if off, these lights will also go off.