User Guide

ACDSee™ Pro User Guide
116
Levels options
Channel Specifies the brightness or color channel you want to adjust.
Shadows Specifies the blackpoint of an image.
Move the slider or type a number from 0 to 255 into the spin box to
define the blackest area of an image. As the value increases, the dark
colored areas of the image become darker.
Midtones Specifies the gamma correction in an image.
Move the slider or type a number from 0.00 to 2.00 into the spin box
to set the amount of gamma correction. Higher values make the
image appear brighter, while lower values make the image appear
darker.
Highlights Specifies the whitepoint of an image.
Move the slider or type a number from 0 to 255 into the spin box to
define the whitest area of an image. As the value increases, the light
colored areas of the image become lighter.
Clipped % Indicates how much of the image detail is lost due to blackpoint and
whitepoint correction.
Shadows picker Click the Shadows picker and then click the image area you want to
set as the blackpoint.
Midtones picker Click the Midtones picker and then click the image area you want to
set as the gamma correction value.
Highlights picker Click the Highlights picker and then click the image area you want to
set as the whitepoint.
Auto Select one of the following options:
• Adjust Contrast: automatically analyzes and adjusts image
contrast.
• Adjust Color and Contrast: automatically analyzes and adjusts
each color channel independently, and then adjusts the
contrast.
• Adjust Color and Brightness: automatically analyzes and
adjusts image color and brightness.
• Tolera nce : opens the Tolerance settings dialog box. Specify the
maximum clipping percentage for Shadows and Highlights,
and click OK. ACDSee adjusts the image levels automatically.
Exposure warning Highlights over- and under-exposed areas of the image.
Reset Discards all changes and reverts to the original image levels.