Very good notebook app on Mac. Two features would make it much better, especially the first:
1. Integrate a full outliner with: a) The ability to collapse any topic with subtopics to make it possible to focus on one section at a time, and b) the ability to move items up or down in the outline with automatic re-numbering if applicable
2. Drawing or mark-up features in the Mac version to allow for marking up pdf files or notes (beyond just highlighting) and for making simple diagrams.
Also, I may be missing something, but I can't figure out a way to set the default font size for notes. It's a pain to have to manually change the font from the default of 11 pt (hard to read on the screen) every time.