Operation Manual

To choose a color value sample size for the Color meter
µ
In the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose an
appropriate color value sample size from the Adjustment Action pop-up menu (with a
gear icon).
Choose a color value
sample size here.
Using an External Editor
If you need to perform more advanced image operations, such as compositing, you can
set an external editor for use within Aperture. First you have to specify which application
Aperture should use and the file format (TIFF or PSD). You only have to do this once. Then
you select an image and choose a menu command to have the image open in the
application designated as the external editor. You can also set an external editor for audio
and video files.
To set an external editor for images in Aperture
1 Choose Aperture > Preferences, then click Export.
2 Click the Choose button to the right of the External Photo Editor field, navigate to an
application in the Select Application dialog, then click Select.
The application’s name appears in the External Photo Editor field.
3 Choose the appropriate file format (TIFF or PSD) from the External Editor File Format
pop-up menu, then enter a resolution in the “dpi” field.
This is the file format Aperture uses when opening files in external editors.
Tip: It’s a good idea to choose the 16-bit option for the External Editor file format because
the larger bit depth provides an exponentially higher number of colors each pixel can
express, and the higher bit depth option helps reduce color clipping and banding.
459Chapter 16 An Overview of Image Adjustments