Operation Manual

3 Drag the Cold Area Display Threshold slider to the right to increase the sensitivity to
shadow pixels, and to the left to decrease it.
Setting Up the Viewer for Onscreen Proofing
Images displayed on your computer screen may look different when displayed on
computer screens that use different color technologies. Your images may also reproduce
differently in print depending on the type of printer, the paper used, and the color profile
of the printing device.
To see what an image will look like when you print it or view it on a different display, you
can have Aperture adjust your display so that your images resemble the final results. To
adjust your computer display, you choose a proofing profile that matches, as closely as
possible, the characteristics of the final output device. For example, if your image will be
printed on sheet-fed coated paper, you can choose a proofing profile for sheet-fed coated
paper to see a close approximation of what the printed image might look like. Aperture
provides several dozen profiles that match the characteristics of many printers, display
devices, and color spaces.
After choosing a proofing profile that matches the final output of the image, you turn on
the onscreen proofing feature, and the image changes to show the expected results.
Onscreen proofing alters the look of images in the Viewer and in Full Screen view.
To choose a proofing profile
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Choose View > Proofing Profile, then choose the profile you want from the submenu.
To turn onscreen proofing on or off
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Choose View > Onscreen Proofing (or press Shift-Option-P).
Note: After setting up onscreen proofing, make sure to set your image export preset to
match the eventual output of the image. Choose Aperture > Presets > Image Export,
then, in the Image Export dialog, choose the profile you want from the ColorSync Profile
pop-up menu. For more information about exporting images, see Exporting Your Images.
Working with Preview Images
Aperture allows you to create and use JPEG previews of versions in the library. Preview
images improve the display of images in Aperture and allow you to easily use your images
in other applications. These preview images are used to speed up the display of images
in the Viewer, in the Browser, and in Full Screen view. Previews are JPEG images generated
by Aperture that represent the original master with any applied adjustments.
239Chapter 6 Displaying Images in the Viewer