
Step by Step
Making Calls – Basic Functions
42
Adjusting the Display to a Comfortable Reading
Angle
You can swivel the display unit. Adjust the display unit so that you can
clearly read the screen.
Illuminated display
When operating the Octophon F640 TDM, e. g. when entering a
number, the display automatically lights up. The display lighting
switches off automatically a few seconds after finishing the last ac-
tion.
Adjusting the display contrast
The display has four contrast levels that you can set according to your
light conditions.
+
or
-
Press these keys while the phone is idle.
Select and confirm.
+
or
-
Change the display contrast. Press the key repeatedly until the de-
sired level is obtained.
i
Save.
Setting the contrast for key labels
You can adapt the contrast for a connected key module for
Octophon F640 to the lighting conditions in eight levels.
+
or
-
Pressing one of the key in idle mode
Select and confirm.
+
or
-
Keep pressing the key until the desired contrast is set.
i
Save.
Display contrast
Key label contrast