Optoma TH7500 User Manual page 29

(*) For HDMI only.

Color Space
Select an appropriate color matrix type from AUTO, RGB,
RGB(0-255) RGB(16-235)
(*)
Color Settings
Press into the next menu as below and then use
select item.
Red Gain/Green Gain/Blue Gain/Red Bias/Green Bias/Blue Bias:

Use or to Red, Green, or Blue for brightness (Gain) and
contrast (Bias).
 Reset: Choose "Yes" to return the factory default settings for
color adjustments.
Input Source
Use this option to enable / disable input sources. Press
the sub menu and select which sources you require. Press "Enter"
to finalize the selection. The projector will not search for inputs that
are not selected.
User Controls
or YUV.
(*)
or to
to enter
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English