User Guide

Chapter 5: Editing
103
Removing a color cast
You can use the Color Cast tool to remove an unwanted hue from an image. For example, if
you take a photo at sunset and the resulting image has a reddish hue, you can use the Color
Cast tool to remove it. You can save your options as a preset for future use.
To remove a color cast from an image:
1. In Edit Mode, on the Edit Panel, click Color.
2. Select the Color Cast tab.
3. Click an image area that should be white or gray. The color square shows the color of the
original pixel on the left, and of the modified pixel on the right.
4. To specify the color cast removal strength, move the slider. Higher settings remove more
of the unwanted color.
5. Do one of the following:
x Click Done to apply your changes and close the tool.
x Click Cancel to discard all changes and close the tool.
If you are having difficulties achieving the desired effect, try clicking an image area
that is a different shade of white or gray.
Changing image color depth
You can modify an image's color depth in the Viewer. Color depth refers to the range of colors
an image contains.
To change the color depth of an image:
Click Modify | Change Color Depth, and select one of the options described below.
Color depth options
Black and White Two-color black and white palette
16 Grays 16-color grayscale palette
256 Grays 256-color grayscale palette
16 Colors 16-color palette
256 Colors 256-color palette (GIF format uses 256 colors by default)
Hicolor 32,768-color palette
Truecolor 16,777,216-color palette of all colors visible to humans
16 bit grayscale 16-bit grayscale palette
48 bit color 48-bit color palette