Extensis suggests using a header graphic of a certain size. To quote their instruction: “A 1450 x 200 pixel .png is recommended” But on larger monitors you can stretch the site wider that the header and the thumb columns center to fit the page size. It looks a bit awkward since the graphic is left aligned. If it floated as a centered object, it might work better.
Anyone have an idea on how to constrain the page width to display no wider than the header? Anyone?