LG CineBeam Laser 4K Owner's Manual page 133

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[High Contrast]
(Q. Settings)
When this feature is set to [On], it adjusts the background of some of the menus on
the screen and font colours to highlight the contrast between the light and dark areas.
[Grayscale]
(Q. Settings)
You can see the items more clearly by changing the colour of the menu provided on the
image and screen to black and white. Set to [On].
[Invert Colours]
(Q. Settings)
To enhance the visibility of the menus on the screen, you can invert and calibrate certain
colours in some menus. Set to [On].
[Accessibility] [High Contrast]
[Accessibility] [Grayscale]
[Accessibility] [Invert Colours]