Geeetech A30 - Calibrating the Touch Screen

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2.3.3 Calibrating the Touch Screen
The touch screen may have errors in terms of its displaying effects, for the reason of
long-time usage. But no worries! It is effective to calibrate the screen via the calibration
function.
Click to enter the [screen calibration] mode. Click the ―+‖ on the screen,
according to the prompts. If the calibration is successful, a prompt box will pop up, as shown
by the picture below.
Choose [Ok] to return to the [settings] screen.
If screen calibration fails, a prompt box will pop up as the picture below shows. Click
[OK] to recalibrate the screen.