I've recently got into template production (now at the early stages), and I am finalizing my first theme. I want to by able to choose different styles on the page like so http://invent-themes.pl/demo/clear-theme/?page_id=46. I've tried doing a search but I found nothing which gives the complete set. I've noticed more than one template (maybe even 100s) have this kind of selector. Can anybody guide me to a proper selector.