Using Optimization Settings; To Select A Preset Optimization - MACROMEDIA FIREWORKS 8-USING FIREWORKS Use Manual

When a slice is selected, the Property inspector has a Slice Export Settings pop-up menu
from which you can select preset or saved optimization settings.
The preview buttons in the Document window show how the exported graphic would
appear with the current optimization settings.
You can optimize the whole document the same way, or select individual slices or selected
areas of a JPEG and assign different optimization settings for each.

Using optimization settings

You can select from common optimization settings in the Property inspector or the Optimize
panel to quickly set a file format and apply several format-specific settings. When you select
an option from the Default export options pop-up menu in the Property inspector, the rest of
the options in the Optimize panel are automatically set for you. You can further adjust each
option individually if desired.
If you need more custom optimization control than the preset options offer, you can create
custom optimization settings in the Optimize panel. You can also modify a graphic's color
palette using the color table in the Optimize panel.

To select a preset optimization:

Select a preset from the Settings pop-up menu in the Property inspector or the
Optimize panel:
GIF Web 216
forces all colors to websafe colors. The color palette contains up to 216
colors (see "Optimizing GIF, PNG, TIFF, BMP, and PICT files" on page
GIF WebSnap 256
palette contains up to a maximum of 256 colors.
332 Chapter 14: Optimizing and Exporting
converts non-websafe colors to their closest websafe color. The color
336).