The Preview view displays the graphic as it would appear in a Web browser, based on current export settings. 2-Up and 4-Up views compare export previews based on various export settings. In 2-Up and 4-Up views, you can compare optimized versions to the original document.
To display an export preview:
Click the Preview, 2-Up, or 4-Up tab in the document window.
Use the Optimize panel and Color Table panel to change export settings. These panels and the Preview replicate the Export Preview dialog box in previous versions of Fireworks, bringing optimization into the workspace.
You can preview rollover and navigation behaviors, as well as animation, in the Preview view.
For more information on optimizing and exporting graphics in Fireworks, see Optimizing in the workspace and Exporting an image.