Operation Manual

For more information about placing points on the tonal curve, see Adjusting the Tonal
Curve of an Image Using the Curves Controls.
Adjusting the Tonal Curve of the Red Color Channel
You adjust the tonal curve of the red color channel when you want to remove red and
cyan color casts in the image.
Before Red Curves adjustment After Red Curves adjustment
EffectRed adjustment
Adds cyan to the shadows, removing red.Move tonal curve down in the
shadows
Adds red to the shadows, removing cyan.Move tonal curve up in the
shadows
Adds cyan to the midtones, removing red.Move tonal curve down in the
midtones
Adds red to the midtones, removing cyan.Move tonal curve up in the
midtones
Adds cyan to the highlights, removing red.Move tonal curve down in the
highlights
Adds red to the highlights, removing cyan.Move tonal curve up in the
highlights
552 Chapter 17 Making Image Adjustments