Yes, that's what I mean. I'm a little rusty on my Sigil. But the meaning was clear, so it's all good.
Seect a file and right-click to Add semantics, you will be offered a list of semantics including Cover, ToC, text, epigraph, copyright, colophon, dedication, etc.
See:
http://web.sigil.googlecode.com/git/...#add-semantics