Apple Aperture 2 Bedienungsanleitung PDF herunterladen (Seite 201)

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Chapter 6 Displaying Images in the Viewer 201

Note: Because slideshows that use the Best quality setting cannot begin until all preview

images are up to date, preview generation is done in the foreground with a Cancel button

to stop the operation. In all other cases, previews are created in the background.

Rescheduling JPEG Preview Maintenance

For projects in which automatic preview maintenance is disabled, canceled previews

can be rescheduled.

To reschedule JPEG preview maintenance, do one of the following:

m In the Projects inspector, select the project whose JPEG previews you want to start

updating again, then choose Images > Update Previews for Project.

m Control-click the project, then choose Update Previews for Project from the shortcut menu.

Note: Each time you open Aperture, it checks for out-of-date previews in those

projects whose automatic preview maintenance option is enabled and then schedules

the previews for regeneration. If you don’t want previews updated automatically,

disable automatic preview maintenance for your projects. For more information, see

“Controlling Previews with the Project Action Pop-Up Menu” on page 198.

Rendering Preview Images

Aperture renders preview images in four situations:

Â When a library is upgraded—provided that the “Create previews for existing images”

checkbox is selected in the Welcome to Aperture dialog

Â When an image is imported, or a version is created, rotated, or adjusted—provided

that the Maintain Previews item is enabled in the Project Action pop-up menu (with

a gear icon)

Â When you Control-click the library, a project, or an image selection and choose

Update Previews from the shortcut menu

Â Immediately before a slideshow, if the previews are not up to date, and the preset

uses the Best quality setting

When rendering a group of preview images, Aperture uses the current application

preference settings for compression quality and picture size, not the settings that were

specified when preview rendering began. For example, if you have the quality set to 6,

and then halfway through rendering you change the setting to 8, the previews that

have not yet been rendered will be compressed at setting 8. Already rendered previews

are unaffected.

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