Apple Color 1.5 - Manual (Page 244)

2 Add another control point near the top of the red curve, and drag it up until some red
"fill" reappears on the side of the woman's face.
This adjustment adds the red back to the woman's face, but now you've added red to
the highlights of the key light source, as well.
Since the key light for this shot is the sun coming in through the window, this effect is
probably inappropriate and should be corrected.
3 Drag the control point for the white point in the red curve control down until the red in
the brightest highlights of the face is neutralized, but not so far that the lighting begins
to turn cyan.
244 Chapter 9 The Primary In Room