Omron NT631 Series Reference Manual page 256

Special Functions
Backlight brightness adjustment
Middle touch switch
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• Increase 10 steps:
• Increase 1 step:
• Decrease 10 steps:
• Decrease 1 step:
You can adjust the contrast while checking the actual screen.
Brightness and contrast adjustment screen
Brightness
High
Middle
High touch switch
Low
Low touch switch
PT PT
Close screen
Quit
Contrast
Contrast
adjustment
Increase 10 steps
Increase 1 step
Decrease 1 step
Decrease 10 steps
Section 2-16
PC
PT status control area
Display screen
Screen
number
9030
247