There are two table styles provided with the Portable HTML Standard Edition template: Default and AlternateShading. The Default style works well for most tables, but if you want something more eye-catching, try the AlternateShading style. The style alternates the background of each row between gray and white.
Note: If you want to create your own table style, you need to upgrade to WebWorks Publisher Professional Edition. You cannot create or modify Publisher table formats in WebWorks Publisher Standard Edition.