They don't produce richer text, they might write in a richer format, if you can all it that. Non-printing notes/comments were quite common in the DOS days, simi

They don't produce richer text, they might write in a richer format, if you can all it that. Non-printing notes/comments were quite common in the DOS days, similar to the "front matter" in the screen shots, or what people would put in separate UI sections in tools like Scrivener or Ulysses (chapter notes, marginalia, cork boards etc.) A more code-like (and probably extreme) perspective would be this screenshot from sci-fi author Vernor Vinge: http://www.norwescon.org/archives/norwescon33/images/Vinge_screenshot.png http://www.norwescon.org/archives/norwescon33/images/Vinge_s... All kinds of annoations, references, etc – only the indented text is actual for publication.