Using The Keyboard; Function Keys - Asus E401LA E-Manual

Using the keyboard

Function keys

The function keys on your Notebook PC's keyboard can trigger the
following commands:
0
Puts the Notebook PC into Sleep mode
Turns Airplane mode on or off
NOTE: When enabled, the Airplane mode disables all
wireless connectivity.
Decreases display brightness
Increases display brightness
Turns the display panel off
Activates the second screen
NOTE: Ensure that the second display is connected to
your Notebook PC.
Notebook PC E-Manual