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Use the touch calibration to match the touch to the mouse pointer. The more accurate the calibration, the more accurate the mouse pointer movements.
When calling up the touch calibration, the calibration screen will open. The following image will appear:
Follow the instructions by touching the middle of the marks as precisely as possible. After each touch, the mark will move to another position, from 1 via 2, 3 and 4 to 5.
A window will pop up with the calibration result.
If the calibration was not exact enough, a message to this effect will pop up and you have to carry out another calibration.