Apple Aperture 3.5 - Manual (Page 495)

Chapter 13 Customize the Aperture workspace 495
How Aperture displays photos in the Viewer
When a version needs to be displayed in the Viewer, Aperture does the following:
•
Aperture draws the thumbnail image (a JPEG image that is 1280 pixels in the
longest dimension).
•
Aperture draws the JPEG preview, if present.
•
Aperture decodes the original and applies any adjustments to it.
Once the last step is completed, the adjustment controls become available. Because the JPEG
preview is created with all the adjustments for that version, it appears onscreen faster than the
adjusted original would. The result is a sharp preview image that appears quickly in the Viewer.
Set preview preferences
Aperture provides four preference settings for controlling previews. These settings apply to
all libraries.
Open Aperture preferences
m Choose Aperture > Preferences, then click Previews.
The Previews pane appears.
For more information about the Previews pane, see Previews preferences on page 482.
Automatically manage previews
You turn automatic preview maintenance on or off on a project-by-project basis.
Have Aperture automatically update previews for selected projects
1 In the Library inspector, select the projects whose photos you want to maintain previews for.
2 Choose Maintain Previews For Project from the Library Action pop-up menu .
A checkmark appears next to the Maintain Previews For Project menu command. Aperture will
now automatically update previews when photos are imported into the projects, as well as when
versions are created or adjusted.
Note: Turning on automatic preview maintenance does not generate the previews. It only tells
Aperture what to do the next time a photo is imported or a version is created or adjusted. To
generate previews, you can use the commands described in
Manually manage previews on
page 496.
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