If you go to
http://www.dreamwidth.org/manage/settings/?cat=display and select Comment Hierarchy: Display Explicit Comment Hierarchy Indicators (site scheme only), then, when you view a discussion in sitescheme, comments will be numbered as if they were in an outline. This is most useful if you can't process the indents on a comment screen (screen too small, not experiencing the screen visually) or if you are viewing an entry in ?view=flat, but I sometimes find it useful just for discussions with a lot of branching and back and forth. The only thing that's not so great about it is that it's not easily discoverable, but that's why I am telling you about it.
For reference,
the suggestions discussion.
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