Question about Homematic IP Wall thermostat

Display only lights up for a short time when a button is pressed.

The display only lights up for a few seconds when a button is pressed. In the CCU or Raspberrymatic, it can be selected whether only the lighting is switched on first when a button is pressed or whether the function of the button is also selected directly. Completely switching off, in the sense of no lighting even when the button is pressed, is not provided for in this model.