"The categories inherit the template settings of their parents, or use 'category.html' if not specified."

Could you elaborate on that? What do you mean by a "template"? I've played with the demo on your site, and it seems I can customize a header and footer. Are these header and footer the only means to modify a category's template? Since saving a heder/footer feature is disabled in the demo, I couldn't see how it works.

It is my understanding that a modyfied template is something that overrides the default category.html, not just ads to it, as (it seems) is the case with the header/footer fields? Have I missed something in the demo?