Smart Stay is an interesting feature in the new Samsung Galaxy S3 smartphone. It is a feature which takes the face recognition feature in Android 4.0 to the next level. Smart Stay basically does face detection and responds to it by adjusting the brightness to an optimum level. If Smart Stay detects that you are not watching the screen then it dims the screen to save power. Smart Stay uses the front facing camera in Samsung Galaxy S3 for periodical face recognition.How to set up Smart Stay?Setting up Smart Stay is quite easy. The set up is done through the Settings app. Step 1: Start by pulling down the Notification drawerStep 2: Tap on the Settings iconStep 3: Trace Display and tap on itStep 4: Trace Smart Stay from the menuStep 5: Check the box adjacent to the optionThis will enable Smart Stay. A pop up window will appear which explains the scenarios where the Smart Stay feature won’t work. They are when: Step 1: Front end camera fails to detect faceStep 2: Front camera is used for the application andStep 3: Device is used in dark environmentYou can check the box adjacent to ‘Do not show again’ and tap on OK. Smart Stay will be activated when you reach the Screen timeout limit. You can change this value by following the steps given below. Step 1: Direct yourself to Display settingsStep 2: Tap on the Screen timeout tabStep 3: Choose the interval. It can range from 15 seconds to 10 minutesWhen Smart Stay is active, an eye ball icon will appear on the top most portion of the screen on your Galaxy S3.