Settings
>
Display and Backlight
> Adjusting Contrast
Adjusting Contrast
Proceed as follows:
•
Using the telephone
1.
Press the
Menu key
and open the menu
settings > display > contrast
.
2.
Tap on
and
to configure the desired contrast and confirm with
OK
.
COMfortel 1600 - Firmware V2.2 - COMfortel Set V3.16 - Advanced Information V10 02/2019
and 
to configure the desired contrast and confirm with