User Guide

Chapter 5: Painting And Image Editing
When Preserve Visibility is selected and you use the Eraser tool, pixels you “erase” are painted with
the current background color; they are not erased to clear. Also, when you use any painting tool to
apply color, you cannot make pixels more or less transparent. This is why you cannot apply any color
in clear areas when Preserve Visibility is selected.
When you select Preserve Visibility, you can paint and apply filters to modify pixels that are less than
100% transparent. You can change the hue, saturation, and intensity of pixels but can’t change their
transparency.
To paint or apply filters to an entire image:
Deselect Preserve Visibility. This turns off the visibility mask and lets painting tools and filters
affect the entire image.
Image filters & effects
Canvas provides commands that you can use to transform images for a variety of effects. These
commands can be used to alter entire images or only selected areas, as well as image channels.
The commands in the Image | Filter menu are often called “filters” because they “filter” images or
selections pixel-by-pixel. This section explains how to use these filters as well as other commands in
the Image menu.
The Filters menu is also located in the Properties bar for quick access to image effects.
Applying effect filters
You can use the Render, Stylize, and Offset filters to transform images. The Render filters apply
forms or textures to an image. The Stylize filters apply a conceptual effect to an image. Stylize filters
include Emboss, Trace Contour, and Solarize. The Offset filter shifts the pixels within an image.
Rendering clouds
You can apply texture to areas in an image, such as skies or walls, by applying the Clouds filter. The
Clouds filter renders soft swirls of color using the foreground and background colors.
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