Apple Aperture 2 - Manual (Page 416)

416 Part III Performing Image Adjustments
Adjusting Brightness in the Image
You can adjust the Brightness parameter when you want to lighten or darken your
image. When you make a brightness adjustment, the brightness values of the midtone
pixels in the image change the most. You can change the brightness of the image
temporarily to see how the adjustment affects details in the shadows, midtones, and
highlights. For more precise control over the range of tonality in the image, consider
using the Levels adjustment controls. For more information about adjusting levels, see
“
Working with the Levels Controls ” on page 429.
To adjust brightness in an image:
1 Select an image.
2 In the Exposure area of the Adjustments inspector or the Adjustments pane of the
Inspector HUD, adjust the Brightness parameter by doing one of the following:
 Drag the Brightness slider.
 Click the left or right arrow in the Brightness value slider to change the brightness of
the image by 5 percent increments, or drag in the value field.
 Double-click the number in the Brightness value slider, then enter a value from
–2.00 to 2.00 and press Return.
A value below 0.0 decreases the brightness of the image. A value greater than 0.0
increases the brightness of the image. The brightness of the image updates as you
change the parameter value.
Before Brightness adjustment After Brightness adjustment
Use the Brightness
slider and value slider
to lighten or darken
the image.