ViewSonic Optiquest Q190mb User Manual page 8

To adjust the foreground white level of screen image.
Contrast :
▲ : increase contrast, ▼ : decrease contrast
To adjust the background black level of screen image.
Brightness :
▲ : increase brightness, ▼ : decrease brightness
Provides four preset color adjustments:
Color Adjust :
9300K, 6500K, 5400K, and User Color for improved brightness and
color saturation. Press button ② ② ② ② to select the preset color.
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