Identifying color channel clipping – Apple Aperture 2 User Manual
Page 343
Chapter 14
An Overview of Image Adjustments
343
III
Identifying Color Channel Clipping
When performing adjustments, it’s useful to know if you’re clipping one or more color
channels and thereby losing important image details.
To identify color channel clipping:
m
Press Command while dragging the following sliders:
 Exposure slider (Exposure controls): Shows highlight clipping.
 Recovery slider (Exposure controls): Shows highlight clipping.
 Black Point slider (Exposure controls): Shows shadow clipping.
 Black Levels slider (Levels controls): Shows highlight clipping.
 White Levels slider (Levels controls): Shows highlight clipping.
If one or more color channels are clipped as a result of making one of the adjustments
above, colored overlays appear over the areas of the image where clipping is occurring.
Release the Command key, and the color overlays disappear.
The color of the overlay indicates which color channel is clipped. For more information,
see the next section, “
Understanding Color Channel Clipping Overlay Colors
Note: The color channel clipping overlays appear regardless of whether the Highlight
Hot & Cold Areas command is turned on. For more information about the Highlight Hot
& Cold Areas command, see “