Corel Painter X3 Win/Mac, EDU, EN Guía de usuario Pagina 876

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In Corel Painter, you can make this decision during the process of saving the image to
GIF format, by using the Preview window on the Save As GIF Options dialog box.
To visually reduce the number of colors
1 Choose File Save As and name your image file.
2 Choose the GIF file format, and click Save.
3 Click OK to dismiss the layer warning, if displayed.
4 In the Save As GIF Options dialog box, in the Number Of Colors area, enable
the 256 Colors option.
5 Enable the 128 Colors option.
In the preview window, the image appears in 128 colors.
6 Continue reducing the number of colors in the graphic until you find the minimum
number of colors necessary for adequate display on your web page.
7 Enable the Quantize To Nearest Color option if you want Corel Painter to look at
each pixel and pick the nearest color. Enable Dither Colors if you want
Corel Painter to apply a pattern to the colors chosen to generate a more accurate,
less banded result.
8 You can now either save the graphic element to place on the web page or return to
Corel Painter to work on the design and color balance.
The RIFF format contains data about your image that is lost when you
convert it to GIF. If you want to edit the file later, save a RIFF copy before
you generate a GIF version.
Creating rollovers
Rollovers are interactive objects that can change in appearance when you click or point
to them. They are often used as navigation tools on the web. For example, you can make
a button change color when it is clicked or display text when you point to it.
The rollover effect is accomplished in the web browser using JavaScript image
swapping. The idea is simple: each rollover area uses two or more separate images of the
same dimensions. In response to a user action (like moving the pointer over the image),
one image is quickly replaced by another.
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