What template belongs to which page?

You should probably read up here.

You can go to manage –> pages –> about and click on the + in the sidebar that says page template though if you need to find out.

Went to manage -> pages->, but wasn’t able to edit anything but a paragraph in the html.

Am trying to find something under the help for beginners, but there’re so many files to wade through.

Check out Template_Hierarchy