Apple Aperture 3.5 - Manual (Page 291)

Chapter 7 Make image adjustments 291
You adjust the tonal curve of the green color channel when you want to remove green and
magenta color casts in the image.
Before Green Curves adjustment After Green Curves adjustment
You adjust the tonal curve of the blue color channel when you want to remove blue and yellow
color casts in the image.
Before Blue Curves adjustment After Blue Curves adjustment
1 If the Curves controls aren’t shown in the Adjustments inspector or the Adjustments pane of the
Inspector HUD, choose Curves from the Add Adjustment pop-up menu.
Choose a color channel from
the Channel pop-up menu.
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