8
3 Operating elements
3.7
Light key
Use this key to switch the il-
lumination on or off. The illu
-
mination automatically switch-
es off after a pre-set period
(see section 7.8.4).
3.8
Adjusting the contrast
The contrast of the display is au
-
tomatically controlled in relation
to the temperature.
You can adjust the contrast
manually by holding the Light
key pressed while operating the
Up or Down Arrow key at the
same time.