Operation Manual

Using Modifier Keys to Identify Color Clipping
In Aperture, you can use modifier keys to get instant feedback on channel clipping when
using controls in the Exposure and Levels adjustments. Color overlays appear on the
image when you press the Command key and drag the sliders to indicate that any, all,
or a combination of color channels have been clipped.
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
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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 shadow clipping.
• White Levels slider (Levels controls): Shows highlight clipping.
If one or more color channels are clipped as a result of adjusting one of the above
parameters, 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 Highlight Hot &
Cold Areas is turned on. For more information about the Highlight Hot & Cold Areas
feature, see Showing Hot and Cold Areas in Your Images.
453Chapter 16 An Overview of Image Adjustments