Curtis GPD359B, User Manual

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Tap the “USB” to set the USB working mode.
You can calibrate the touch screen if it does not respond accurately to your stylus taps.
a) Tap the Calibration button on the System info. Screen.
b) Tap to the calibration indicated on the screen.
c) Tap and hold at the center of the target.
d) When the target moves to another position, tap and hold at the center of the new
target.
e) Repeat each time to complete the calibration process. When completed, tap screen
to return to the Settings screen.