Operation Manual

Showing Hot and Cold Areas in Your Images
Images may occasionally have overly bright areas where color information is beyond the
standard limits of the Aperture working color space. For example, white areas in an image
brightly lit with direct sunlight, or bright flashes off a water surface, may be so bright that
their color is outside the working color space. Similarly, images may occasionally have
black areas where color information is below the standard limits of the working color
space. Aperture can display these “hot” and “cold” areas of an image with tints on the
image to help you identify hot and cold areas. You may be able to adjust the areas
identified by the hot and cold area overlays and recover highlight and shadow detail by
changing the exposure, the recovery, the black point, or the gamma setting of the image.
To show the hot and cold areas in your images
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Choose View > Highlight Hot & Cold Areas (or press Shift-Option-H).
You can also monitor color clipping per color channel when performing specific
adjustments using modifier keys. For more information, see Using Modifier Keys to Identify
Color Clipping.
You can choose to view the hot and cold overlays in color or monochrome.
To change the clipping overlays display color
1 Choose Aperture > Preferences, or press Command-Comma (,).
2 In the Preferences window, click Advanced.
3 Choose either Color or Monochrome from the “Clipping overlay” pop-up menu.
You can adjust the threshold or sensitivity of the hot area overlays. By default, the threshold
is set to 100%. You can set Aperture to flag pixels that are near the 100% mark by lowering
the threshold in the Preferences window.
To adjust the hot area display threshold
1 Choose Aperture > Preferences, or press Command-Comma (,).
2 In the Preferences window, click Advanced.
3 Drag the Hot Area Display Threshold slider to the left to increase the sensitivity to highlight
pixels, and to the right to decrease it.
You can also adjust the threshold or sensitivity of the cold area overlays. By default, the
threshold is set to 0%. You can set Aperture to flag pixels that are near the 0% mark by
increasing the threshold in the Preferences window.
To adjust the cold area display threshold
1 Choose Aperture > Preferences, or press Command-Comma (,).
2 In the Preferences window, click Advanced.
238 Chapter 6 Displaying Images in the Viewer