First, first confirm the difference between the position of the pen point on the screen and the position displayed on the screen. For example, when the pen point touches the screen, the screen displays its position one centimeter to the left.
second Enter the calibration procedure. Five crosses will be displayed on the screen. Do not point the center of the cross. Click one centimeter to the right of the center of the cross (the direction opposite to the position of the first step). After five points, the calibration program will automatically Exit, the calibration is complete.