Optoma TSFN-IR01 - Manual (Page 26)

User Controls
Color Space
Select an appropriate color matrix type from RGB or YPbPr.
RGB Gain/Bias
Press into the next menu as below and then use or to
select item. Use or to select Red, Green, or Blue for brightness
(Gain) and contrast (Bias).
B/W Extension
Black and White Extension can stretch the black and white levels to
automatically increase the contrast of input image. This unit has 2
pre-set modes that allow the user to switch among the pre-sets to
obtain different image effects. (Off/On)