Mitsubishi Electric CITY MULTI PAR-CT01MAU-SB Manuel D'utilisation page 66

Function settings
4
If the touch panel is left untouched for one minute, the calibration will be canceled and the display will
automatically return to the previous screen.
To properly calibrate the touch panel, use a pointy but not sharp object to touch the dots.
* A sharp object may damage or scratch the touch panel.
66
Touch the nine black dots in the order they appear on
the screen.
When all nine black dots are touched, the calibration
is complete, and the display will return to the touch
panel menu.