Apple Aperture 3.5 - Manual (Page 171)

Chapter 5 View and compare photos 171
This option splits the display of the currently selected photos between the Main Viewer and the
Secondary Viewer. For example, if you select seven photos to view, the Main Viewer shows as
many as fit its screen size, and the remaining photos appear in the Secondary Viewer. Thus, one
Viewer might show four photos, and the other Viewer might show the remaining three of the
seven. You can also use the Span option to select two photos and compare them, showing one
photo per display.
m To turn off the display of photos in the Secondary Viewer, making the screen black: Choose View >
Secondary Viewer > Black (or press Option-B).
This option sets the Secondary Viewer to be a blank screen.
m To turn off the dual-display function: Choose View > Secondary Viewer > Off (or press Option-X).
Show hot and cold areas in your photos
Photos 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 a photo 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, photos 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 photo to help
you identify where they’re located. 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 image’s exposure,
recovery, black point, or gamma setting.
Show the hot and cold areas in your photos
m Choose View > Highlight Hot & Cold Areas (or press Option-Shift-H).
You can also monitor color clipping per color channel when performing specific adjustments
using modifier keys. For more information, see
Identify color channel clipping on page 342.
Change the hot and cold area threshold and clipping overlay color
You can adjust the threshold, or sensitivity, of hot and cold area overlays. By default, the hot
area threshold is set to 100%, and the cold area threshold is set to 0%. You can set Aperture to
flag pixels that are near 100% or 0% by lowering the hot area threshold or increasing the cold
area threshold.
You can also choose to view the hot and cold area overlays in color or monochrome.
1 Choose Aperture > Preferences, or press Command-Comma (,).
2 In the Preferences window, click Advanced.
3 Do any of the following:
•
To adjust the hot area display threshold: Drag the “Hot Area threshold” slider to the left to
increase the sensitivity to highlight pixels, and to the right to decrease it.
•
To adjust the cold area display threshold: Drag the “Cold Area threshold” slider to the right to
increase the sensitivity to shadow pixels, and to the left to decrease it.
•
To change the clipping overlay color: Choose either Color or Monochrome from the “Clipping
overlay” pop-up menu.
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