Operation Manual

To open Aperture preferences
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Choose Aperture > Preferences, then click Previews.
The Previews pane appears.
• “New projects automatically generate previews” checkbox: Select this checkbox to have
Aperture automatically build and maintain previews for new projects you create in the
current library (and, by extension, in new libraries). This checkbox sets the Maintain
Previews For Project setting (described in Controlling Previews with the Library Action
Pop-Up Menu) for each new project as it is created.
• “Use embedded JPEG from camera when possible” checkbox: Select this checkbox to have
Aperture use the JPEG thumbnail produced by the camera, if available.
• “Share previews with iLife and iWork” pop-up menu: Choose whether to enable sharing
of JPEG preview images with iLife and iWork applications.
• Photo Preview pop-up menu: Choose the size (width and height in pixels) of preview
images from this pop-up menu. The default setting is Half Size. The “Don’t limit” setting
tells Aperture to make each preview the same size as the version. The other choices
limit the preview to a size no larger than the specified size. A preview is never wider
or taller than the version from which it is made. Aperture places asterisks (*) next to
choices that match the resolution of your currently connected displays. Not all display
resolutions are offered in the pop-up menu, so you may not see any asterisks.
• “Photo Preview quality” slider: Use this slider to determine the compression setting used
for the JPEG previews. The scale ranges from 0 (very high compression and relatively
low quality) to 12 (very low compression and relatively high quality). The lower the
quality setting, the less disk space a preview uses.
Note: Changing the preview quality and size settings does not affect previews that have
already been generated. If you want to regenerate previews using the new settings, you
must use the methods described in Controlling Previews with the Library Action Pop-Up
Menu and Controlling Previews with Shortcut Menus.
Controlling Previews with the Library Action Pop-Up Menu
You turn automatic preview maintenance on or off on a project-by-project basis.
241Chapter 6 Displaying Images in the Viewer