
Sony Xperia E4
Find "Brightness"
Slide two fingers down the display starting from the top edge of your phone.
Press Brightness.
Press Brightness.
Set display brightness
Press Adapt to lighting conditions to turn the function on or off.
If you turn off the function:
Press and drag the indicator right or left to set the display brightness.
Press and drag the indicator right or left to set the display brightness.
Return to the home screen
Press the home icon to return to the home screen.