Canon i-SENSYS MF6140dn User Manual page 131

[ ]
[ ]
For <Contrast>
Adjust the contrast using [
[ ]
[ ]
For <Invert Screen Colors>
Select <Off> or <On> using [
<Off>
<On>
6
Press [ ] (Menu) to close the menu screen.
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Darker.
Brighter.
] or [ ] and press [OK].
Decrease the contrast.
Increase the contrast.
] or [ ] and press [OK].
Use the default display colors.
Invert the display colors.