"In an earlier article, I covered the basics of making outlines
in Emacs, but there's a lot more that you can do with them. In this
article I'll show how to export and print outlines, customize
outline heading line colors, and use outline mode's special
features in everyday documents--such as numbered lists, traditional
outlines with Roman numerals, and even book manuscripts containing
chapter and section headings.
"You're not stuck with asterisks as the only way to delimit
headings. By default, page breaks are also valid delimiters, which
comes in handy when you're working on paginated files--if you turn
on outline mode in such a file, each page becomes a major heading
in the outline itself..."