Adobe Fireworks CS3 用户手册

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ADOBE FIREWORKS CS3
User Guide
263
GIF Adaptive 256
is a color palette that contains only the actual colors used in the graphic. The color palette contains 
up to a maximum of 256 colors.
JPEG – Better Quality
sets quality to 80 and smoothing to 0, resulting in a high-quality but larger graphic.
JPEG – Smaller File
sets quality to 60 and smoothing to 2, resulting in a graphic less than half the size of a Better 
Quality JPEG but with reduced quality.
Animated GIF Websnap 128
sets the file format to Animated GIF and converts non-websafe colors to their closest 
websafe color. The color palette contains up to 128 colors.
For more information about file types, see “Choosing a file type” on page 265.
To specify custom optimization settings:
1
In the Optimize panel, select an option from the Export File Format pop-up menu.
2
Set format-specific options, such as color depth, dither, and quality.
3
Select other optimization settings from the Optimize panel Options menu, as necessary.
For more information about specific optimization controls, see the appropriate sections in “Optimizing in the 
workspace” on page 261.
4
You can name and save custom optimization settings. Names of saved settings are displayed in the preset optimi-
zation settings in the Settings pop-up menu in the Optimize panel and the Property inspector when slices, buttons, 
or the canvas are selected. For more information, see “Saving and reusing optimization settings” on page 275.
To modify the color palette:
If the Optimize panel isn’t already open, select Window > Optimize to view and edit a document’s color palette.
To optimize individual slices:
1
Click a slice to select it. Shift-click to select more than one slice.
2
Optimize the selected slices using the Optimize panel.
Previewing and comparing optimization settings
The document preview buttons display the graphic as it would appear in a web browser, based on optimization 
settings. You can preview rollover and navigation behaviors, as well as animation. 
The Original button and the document preview buttons
The document preview buttons display a document’s total size, estimated download time, and file format. The 
estimated download time is the average amount of time it would take to download all the document’s slices and 
frames on a 56K modem. The 2-Up and 4-Up views display additional information that varies depending on the file 
type selected.
You can use the Optimize panel to optimize a document while viewing a preview as if you were in Original view. You 
can optimize the entire document at once or only selected slices. The slice overlay helps you differentiate the slices 
currently being optimized from the rest of the document. The slice overlay displays areas not currently being 
optimized with a dimmed, transparent white tint. You can turn the slice overlay on or off.