Omron Programmable Terminals NT631 Setup Manual page 205

System Maintenance
188
Setting from the System Menu
Adjust the contrast of the display panel by following the menu operation from
the System Menu shown below.
Ver 4.12
Select Maintenance Mode.
Select I/O Settings.
Select Contrast Adjust.
Adjust the contrast with the touch switches
in the left half of the screen.
[ ]: Increase 10 steps
[ ]: Increase 1 step
[ ]: Decrease 1 step
[ ]: Decrease 10 steps
Press Quit.
The contrast is set and the NT631/NT631C
returns to the I/O SETTINGS MENU screen.
Section 6-11