13.2.2. Touch screen calibrationIndicationDue to mechanical impact or the aging process of the Touchscreen, its calibration references can be changed.An indication for this is, when tapping a dedicated button theadjacent button is activated. Or when individual buttons are nolonger operable.In such cases, the Touch screen should be recalibrated.CalibrationTo 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 youthrough the calibration procedure.3. Follow the on screen instructions respectively.d&b D80 Manual 1.8 en 71