It's not all good news. Ctrl+z will not work beyond a certain word count. I had a rather large piece of typing, highlighted it to copy and quite by accident, typed ctrl+v followed immediately by ctrl+z. It did not undo at all. Instead, a popup appeared that invited me to view my history. The catch is I would have had to upgrade to the $72/year plan to do so. Pretty dirty trick - no undo button, disable ctrl+z, and demand $72 to do what ordinarily ctrl+z should do. I'll be looking for another note program and repeating this incident whenever the opportunity arises.