Apple Aperture 2 - Manual (Page 420)

420 Part III Performing Image Adjustments
Adjusting Saturation in the Image
You can change the value for the Saturation parameter to either give your image an
extra burst of color or tone down the color palette by desaturating the image.
To change the saturation of an image:
1 Select an image.
2 In the Enhance area of the Adjustments inspector or the Adjustments pane of the
Inspector HUD, adjust the Saturation parameter by doing one of the following:
 Drag the Saturation slider.
 Click the left or right arrow in the Saturation value slider to change the saturation of
the image by 10 percent increments, or drag in the value field.
 Double-click the number in the Saturation value slider, then enter a value from 0.00
to 4.00 and press Return.
A value below 1.00 decreases the color saturation in the image, and a value above 1.00
increases the saturation. A value of 0.00 removes all color from the image, making it
grayscale. A value of 4.00 increases the saturation by 400 percent.
The saturation of the image updates as you change the parameter value.
Before Saturation adjustment After Saturation adjustment
Use the Saturation slider
and value slider to adjust
the saturation of colors in
the image.