Like many web-based systems, ProjectForum internally has a number of underlying HTML templates which data for the specific page is "poured into" to create the final page that you see if you do a "View Source" in your browser. These underlying templates however are strictly for internal use and cannot be modified (partly this is because some of the templates can be quite complex, reflecting a number of different scenarios and conditions they must accommodate).
People often want to access the underlying template to change what is displayed on the page or how it is displayed. The recommended way to do this is via a custom theme, which allows you to modify the stylesheet used to render the page. There are a number of posts in this blog which talk about specific things you might want to do, ranging from hiding elements or changing colors, to using Javascript to move entire sections of the HTML in the page from one part to another.
