Sometimes the large brightly lit LCD display on the ET8500 can be frustrating in some environments such as the Lounge
So in 4.2, a facility has been added to automatically dim the display after a set time period to a specified brightness.
Obviously when you change something via the remote, the screen reverts to the normal brightness setting so you can see the current information on the LCD display
To set up, go to Menu/Setup/System/Front Display/settings and change:
Dim delay: to the required interval
Brightness (Dimmed): to required setting.
I typically auto dim down to black (no display) after 5 minutes