Looks strangely like someone else had a discussion about this two years earlier...
Anyway I would like to be able to add folders inside each notebook to better organize notes at a glance.
To clarify under each open notebook, wherein you would see the notes' titles, I would like the ability to place a folder here and move the notes into them.
So lets say I'm keeping notes on chapters of a book.
I might say create "Chapter 5 Notes" as a folder, and relocate all the chapter 5 notes underneath it.
Obviously the ability to expand/collapse the folder would be necessary as well.