Professional Themes for Xenforo

Is there an instruction how to develop a new theme. Does default xenforo installation comes with one single page that displays all css designs sections utilized like thread, catgory, quote box, breadcrumbs, signatures, backgrounds, containers. If that is the case it will be easy to develop a new theme Or if have to develop a new theme i have to view all the pages to see the output when i develop a new theme.