Apple Aperture 2 - Manual (Page 160)

160 Part II Photo Editing
Navigating Through Images in Quick Preview Mode
As you work with images in the Browser and Viewer, you can set Aperture to display
representations of the images called previews. A preview is a JPEG representation of the
image that has less information than the original and is used to allow Aperture to more
quickly display images. For example, the thumbnails in the Browser are preview
representations of the master reduced to thumbnail size.
Likewise, when you select an image in the Viewer, Aperture first displays a preview
image as it reads the larger master on disk. It then displays the full master once the
image is completely accessed. This process of displaying previews and then the masters
can be nearly instantaneous, or, depending on the size of your masters, there can be a
short delay in the final display.
For more information about creating and working with previews, see “ Working with
Preview Images ” on page 196.
To speed up the accessing and display of images, you can turn on Quick Preview mode.
In Quick Preview mode, Aperture displays preview images only, without reading the
larger masters. You can use Quick Preview mode to rapidly switch between and select
images. For example, you might use Quick Preview mode to quickly select and stack
images, add keywords, or change other metadata. When using Quick Preview mode,
however, there are some things you can’t do, such as make adjustments to images. In
Quick Preview mode, tools and functions that aren’t available appear dimmed.
Depending on your task, you may find switching to Quick Preview mode a great way to
gain speedy access to images.
To turn on Quick Preview mode, do one of the following:
m Choose View > Quick Preview (or press P)
m Click the Quick Preview button in the tool strip.