Samsung Galaxy S4 User Manual page 28

2. Light (RGB) Sensor lets you use the ambient light level
to adjust the screen brightness/contrast. This sensor
decreases screen brightness in dim light.
• In a bright light condition (outdoors), the sensors cause the
device to increase the brightness and contrast for better
viewing.
• In dim light conditions, the device decreases the screen
brightness to compensate.
3. Menu key displays a list of options available for the
current screen. From the Home screen it displays
Add apps and widgets, Create folder, Set wallpaper,
Edit page, Search, Settings, and Help options.
4. Home key displays the Home screen when pressed.
Press and hold to display your recent apps, Task
manager, and Remove all option.
Double-press to activate S Voice.
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