User Guide

Chapter 5: Painting And Image Editing
2. Choose Image | Adjust | Levels.
3. Select a channel or combination of channels in the pop-up menu. The Levels command will
affect only the specified channels.
4. Do one or more of the following:
Lighten highlights: Enter a positive number less than 255 in the right Input Levels
box, or drag the white slider under the histogram. Canvas assigns the maximum output
level to all pixels on the right of the slider.
Lighten shadows: Enter a positive number in the left Output Levels box, or drag the
black slider under Output Levels to increase the minimum output level. This value
becomes the darkest value allowed in the image.
Darken highlights: Enter a positive number less than 255 in the right Output Levels
box, or drag the white slider under Output Levels to set the maximum output value. This
is the brightest value allowed in the image. You can darken highlights in one color
channel to bring brighter colors back into the printable color range.
Darken shadows: Enter a number greater than zero in the left Input Levels box, or drag
the black slider under the histogram. Canvas assigns the minimum output level to all
pixels on the left of the slider.
Adjust midtones: Enter a value in the center Input Levels box or drag the gray slider
under the histogram. To lighten midtones, enter a value from 1.01 to 9.99 or drag the
slider to the left. All pixels on the right of the slider will be brighter than medium gray. To
darken midtones, enter a value from 0.1 to 1.00 or drag the slider to the right. All pixels
on the left of the slider will be darker than medium gray.
5. Click OK.
Saving and loading Levels settings
You can save Levels settings on disk to use again. For example, after correcting a scanned photo, you
can save the settings and use them to correct other images scanned from the same source.
To save Levels settings:
1. In the Levels dialog box, click Save.
2. In the dialog box, type a name for the settings file, select a location, and click Save.
To load previously-saved Levels:
1. In the Levels dialog box, click Load.
2. In the dialog box, locate the settings file you want to open, and click Open.
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