NEC PA1004UL-W User Manual page 146

[MULTI SCREEN]
WHITE BALANCE
This adjusts the white balance for each projector when projecting using a combination of several
projectors.
This can be adjusted when [MODE] is set to [ON].
CONTRAST W, CONTRAST R, CONTRAST
G, CONTRAST B
BRIGHTNESS W, BRIGHTNESS R,
BRIGHTNESS G, BRIGHTNESS B
Adjusting the white color of the video.
Adjusting the black color of the video.
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5. Using On-Screen Menu