Corel PaintShop Pro X7, DE User's Guide download pdf (Page 764)

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760 Corel PaintShop Pro X7 User Guide

make part of your image transparent for a Web page. For example, you

may have a round logo and want to display the background of the

Web page around the logo. In this case, you can choose not to display

one color. Most Web browsers support this option, effectively making

that color transparent.

The GIF Optimizer dialog box contains four tabbed areas in which to

configure the transparency, color, and format options of the file. The

fifth tabbed area displays estimated download times of the image at

various modem speeds.

GIF Optimizer Transparency

You can choose to base transparency on existing image or layer

transparency, or you can sample a color in the image that you want to

make transparent. If you have a selection in your image, you can base

the transparency on the selection.

GIF Optimizer Partial Transparency

A GIF file cannot contain partially transparent pixels. All pixels must be

either transparent or opaque (visible). Original images may contain

partially transparent pixels if the image does not have a background

layer, and you have reduced the opacity of a layer, added a mask,

feathered a selection, or used a brush at a reduced opacity setting. You

can determine whether the partially transparent pixels become

transparent or opaque, and whether they are blended with another

color.

Important! If you mark the

None

option under the Transparency

tab, the options in this area are unavailable.

GIF Optimizer Colors

GIF images have an 8-bit color depth, which means they can display up

to 256 colors. Because these colors are stored in a palette, an image

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Corel PaintShop Pro X7, DE User's Guide Page 764

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