User Guide

ACDSee Pro 2.5 - User Guide
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Adjusting image Levels
You can use the Levels tool to precisely adjust the contrast and light levels in your images. You
can save your options as a preset for future use.
To adjust image levels:
1. In Edit Mode, on the Edit Panel, click Exposure, and then select the Levels tab.
2. Do one of the following:
x Set the options as described below to adjust the contrast and light levels manually.
x Click Auto and select a menu option to automatically adjust image properties.
3. Do one of the following:
x Click Apply to apply your changes and set options on another tab.
x Click Done to apply your changes and close the Levels tool.
x Click Cancel to discard all changes and close the tool.
You can make fine adjustments to any of the sliders in Edit Mode by placing the
cursor over the slider and moving the mouse wheel one click forward or back.
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.