Korg Zero8 Owner's Manual page 26

1. LCD CALIBRATION
This lets you calibrate the touch display. You should perform this operation
when you notice that items in the LCD display are no longer lined up with
the area of the touch panel normally used to select the items.
1. Press the upper left corner of the touch display.
The indicator will be highlighted when your touch is detected correctly.
2. Press the lower right corner of the touch display.
The indicator will be highlighted when your touch is detected correctly.
3. Press the DONE button.
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2. LCD CONTRAST
This lets you adjust the contrast of the LCD display.
Since the LCD display will appear differently depending on your viewing
angle, you should adjust this when necessary.
Range: turn the [0 – 64] knob toward the left to make the characters darker,
or toward the right to make them lighter.
3. FACTORY RESET
This initializes the settings of the ZERO8 to their factory-set state.
1. Press the FACTORY RESET button.
A dialog box will ask "ARE YOU SURE?"
2. If you press "YES," the settings will be initialized to
their factory-set state.
The operation will be cancelled if you press "NO."