d&b D80 - Manual (Page 74)

13.2.2. Touch screen calibration
Indication
Due to mechanical impact or the aging process of the touch
screen, its calibration references may change.
An indication is that when you tap a specific button and the
adjacent button is activated instead or when ap specific button
does no longer work.
In such cases, the touch screen should be recalibrated.
Calibration
To calibrate the Touch screen proceed as follows:
1. From the «Home screen» go to "«Device setup» Þ «More»
Þ «Preferences» Þ «Display»".
2. Select «Touch screen calibration».
Þ The Screen calibration menu will be opened guiding you
through the calibration procedure.
3. Follow the on screen instructions respectively.
d&b D80 Manual 1.9 en 74