Adapts display on Galaxy S4 automatically changes the brightness and contrast of the screen according to the situation and the content. Enable adapt display to make sure you are getting the optimized view. Follow these steps:
1. Open “Setting” app
2. Go to “My Device” tab and open “Display”
3. Tap on “Screen mode”
4. Check the “Adapt Display” Option
From now on, you should expect to have a better viewing experience while reading emails, surfing web, or watching a movie.
Read More Galaxy S4 Tips and Tricks