Operation Manual

5. Click Advanced Calibration (if needed).
Advanced Calibration improves the accuracy of calibration by using
more involved engineering calculations. Use this function only if you
have tried the Standard Calibration and there is still a discrepancy in the
way the touchscreen maps to the display. You can choose 4, 9, 16 or 25
points to calibrate, though we suggest that you first try 9 points, if it is
still not tracking well then try 16 or 25 points. The more points you use
for calibration, the greater the accuracy. Errors in calibration may occur
due to viewing angle, or individual skill, and there may be little
difference in using 16 or 25 points. Note that a touchscreen pen is
recommended for the most accurate results