Lark FreeBird 4.3AT User Manual page 10

Settings
7. Coordinates calibration
When the touch place not correct or no response, please press this
button to adjust.
When a black cross appears on the screen press the very centre of the cross,
using your pointing pen. Than the cross will move to another position, again
press the centre of it. Continue until the 'OK' message appears. Than touch
the screen to confirm the calibration setting and return to the main menu.
In case the calibration process fails, it will be repeated until successful.
8. Update LOGO
This function allow to set customization logo.
The LOGO size must 480x272, .bmp format, not large than 2M,
name must LOGO. BMP. Put the picture in the microSD root directly,
insert the microSD and press "start".
9. USB Setting
In system setting, press
Available options:
Connect: USB connect
Sync: synchronize
ENGLISH
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