[ldolse]

Heuristics has a number of patterns for common headings, but it only handles chapter headings like you're describing if the headings are all in capitals - e.g. ONE, TWO, THREE, etc. If they're a mix of uppercase/lowercase characters then it's basically indistinguishable from lines of poetry and other random unpunctuated text that can appear in a book. Right now heuristics should still insert page breaks at each of those points, which should make it easier to do final edits in Sigil.