MACROMEDIA FIREWORKS 2, Руководство пользователя

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Web Design Features 129
Preview an animation in the Export Preview—
Use
the frame controls in the Export Preview to display an
animated GIF exactly as it will be exported. The Export
Preview shows looping, optimization, disposal methods,
and frame delay.
Exporting an animation
After creating an animation, export it as either an
animated GIF or as multiple files.
To export as an animated GIF:
1
Choose File > Export.
2
Click the Options tab and choose Animated GIF
from the Format pop-up.
3
Make changes to the Palette, Dither, or
Transparency options.
4
On the Animation panel of the Export Preview,
set the disposal method and frame delay for each
frame and choose loop settings.
◆
To select a range of frames, select the first frame,
hold down the Shift key, and then select the last
frame in the range.
◆
To select multiple frames, hold down the
Control key (Windows) or Command key
(Macintosh) while selecting individual frames.
5
Click Next.
6
In the Export dialog box, type a name for the file
and select the destination.
To export as multiple files:
1
Choose File > Export Special > Export as Files.
2
In the Export dialog box, choose Frames in the
Files From pop-up.
3
Type a name for the files and select the
destination.
Transparency
Using Fireworks, create web graphics with fine-tuned
transparencies. Transparency is supported in two
graphic formats: GIF and PNG.
GIF transparency
Transparency is defined in GIF files by designating one
or more colors to be transparent. The designated color is
transparent when the GIF is viewed in a browser.
Use the Export Preview to set or adjust the transparent
area in a GIF. Use the Transparency Eyedropper tools to
add or remove colors from the transparent area.
PNG alpha transparency
Exported PNG files can contain alpha transparency
settings. Alpha transparency is different from GIF
transparency in that gradient levels of transparency can
be specified. This means that pixels may be set to blend
with the web browser's background color or
background image.
However, alpha transparency is not supported fully by
current browsers. Netscape Navigator 4.04 supports
PNG, but not alpha channels. Microsoft Internet
Explorer 4 partially supports PNG alpha channels, but
sometimes displays inconsistently when complex
gradient transparency is defined.