The Histogram command can be applied to paint objects in
edit mode only.
Many commands in the Adjust submenu can be used to uni-
formly adjust one or more selected paint objects, or a paint
object in edit mode.
Working with image-adjustment dialog boxes
Some dialog boxes for image-editing commands include histograms
and preview options to help you achieve the effect you want.
Understanding histograms
A histogram plots the relative number of pixels in each brightness
level in an image.
In the histogram above, shorter bars on the left indicate that the
image doesnt contain large areas of very dark pixels. Higher bars
toward the right of the graph show that the image does contain large
areas of medium and very bright pixels.
To view an images histogram at any time: With an image in
edit mode, choose Filter > View > Histogram.
Using the Preview option
Most dialog boxes for image-adjustment commands include a Pre-
view check box. Select the Preview option to see how settings affect
the image. Preview is available only when a single paint object is in
edit mode.
Brightness levels
Amount of pixels
Minimum (0)
Maximum (255)
More
Fewer
Tip (Mac OS only)
When working with large imag-
es, you can improve speed by
using video LUT animation
instead of previews; see Paint-
ing preferences on
page 15.224.