Remote Technologies IR-PRO T3 - Manual (Page 20)

Operation
13
BACKLIGHT LEVEL
This button displays a window that allows you to adjust the
backlight brightness and enable/disable the Ambient Light
Sensor.
If the light sensor is disabled, there is only one backlight level to
adjust. Press the left arrow or right arrow buttons to adjust. Press
the
OK
button when finished.
With the light sensor disabled, the backlight brightness will
always stay at the same level whenever the T3 is turned-on.