Exporting graphics for use on the web is a two-step process: optimizing, then exporting (or in some cases, simply saving). Optimizing graphics ensures they possess the right mix of color, compression, and quality. After you finalize a graphic's optimization settings, the graphic is ready for export.

You don't have to use the Export Wizard and Image Preview in Fireworks if you're comfortable optimizing and exporting graphics. Fireworks has optimization and export features in the workspace that give you greater control over how files are exported:

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.