This setting turns the backlight in the display window on or off.
You can select one of the menu items available.
OFF:
The backlight in the display window does not light, even during operation.
20sec:
The backlight in the display window lights up for approx. 20 seconds.
(Initial settings)
1min:
The backlight in the display window lights up for approx. one minute.
Always-ON:
The backlight in the display window lights up always.