Operation Manual

Adjusting the Sensitivity of Red Eye Target Overlays
When you target a red eye in a picture, Aperture automatically chooses the area within
the target overlay circle where the desaturation is applied. In a few cases, the area chosen
by Aperture might be either slightly too large or slightly too small (typically including a
few pixels in the eyelid skin, or missing a few red pixels inside the pupil). For these difficult
cases, you can adjust the Sensitivity parameter to change the area where desaturation
occurs. For example, dragging the Sensitivity slider to the left by one notch decreases
the radius of the active area within the Red Eye target overlay by one pixel, and dragging
the Sensitivity slider one notch to the right enlarges it by one pixel.
After Sensitivity adjustmentBefore Sensitivity adjustment
(the eyelids are desaturated)
To adjust the sensitivity of a Red Eye target overlay
1 Click the Red Eye target overlay to select it.
2 In the Red Eye Correction area of the Adjustments inspector or the Adjustments pane of
the Inspector HUD, adjust the Sensitivity parameter by doing one of the following:
• Drag the Sensitivity slider.
• Click the left or right arrow in the Sensitivity value slider to change the sensitivity of
the Red Eye target overlay by single-pixel increments, or drag in the value field.
482 Chapter 17 Making Image Adjustments