Nano Vision UM-430 User Manual - page 14
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Touch + mark position in order then
「Confirm」
If calibration point inputs are correct click
「Confirm」
In case any mistake in calibration points inputs click
「Cancel」
or leave the screen untouched
for about 10 seconds then the Calibration Data will be scrapped.
※ The calibrated Touch Screen coordinates may vary upon the lapse of usage time.
Periodical calibration is recommended.