Corel Painter X3 Win/Mac, EDU, EN Guide de l'utilisateur Page 291

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268 Corel Painter X3 Getting Started Guide
Positive (left) and negative (right) versions of an image.
To invert colors
1 To apply the effect to:
• The canvas — Click the Canvas in the Layers panel.
• A selection — Click a selection tool from the toolbox, and drag in the document
window to select an area.
• A layer — Click a layer in the Layers panel.
2 Choose Effects Tonal Control Negative.
Posterizing an image
Corel Painter offers two different options for posterizing images. You can use the
Posterize effect to reduce the number of color levels contained in an image.
You can also posterize an image by specifying a color set. This effect lets you replace
image colors with those of a specified colors set. This is useful for multimedia work, as
well as applications such as silkscreening. You can use this effect to reduce the number
of colors in an image.
To posterize an image
1 To apply the effect to:
• The canvas — Click the Canvas in the Layers panel.
• A selection — Click a selection tool from the toolbox, and drag in the document
window to select an area.
• A layer — Click a layer in the Layers panel.
2 Choose Effects Tonal Control Posterize.
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