This request may have been made before--I don't recall. As it stands now, to edit a user note, you can either click command-U, start typing, or enter a space. (Maybe some other ways, too.)
The way I most want to use User Notes is to hit return between lines/paragraphs to enter a new thought (within the same verse). I would love to have "return/enter" in a User Note automatically pop it out for editing, as typing or entering a space do.
Would this be simple enough programming-wise to throw in with the next dot release?