Reading through the example email given, and perhaps reading on mobile spurs this idea, summary structure had a lot of headings and bullet points, which makes f

Reading through the example email given, and perhaps reading on mobile spurs this idea, summary structure had a lot of headings and bullet points, which makes for a really long list of a summary. Would it be possible to instead make it a mind map of concepts and cross reference related ideas, instead or as well as a one dimensional list?