Use Smart Screen on Your Samsung Galaxy Tab 4 7.0
Your device supports a feature called Smart screen. Smart screen controls how your device manages the display, and it simplifies select interactions with your device. To access the Smart screen settings, from the Home screen, touch Apps > Settings > Controls > Smart screen .
The Smart stay feature uses the front camera to sense when you are looking at your device and it keeps the screen from turning off regardless of the screen timeout setting.
Mark the checkbox next to Smart stay to turn on the feature.
Smart stay works best under the following conditions:
When the device is held steady and upright.
The front camera is not being used by another application.
The device is in well-lit conditions, but the screen is not in direct light.
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