I would find it very convenient to be able to assign some blank toolbar buttons to various notes.

In my day to day use I find that I am accessing the same notes may times a day.

Perhaps a option to make available 0 to 10 blank assignable buttons.

Thank you for a feature request, some kind of keyboard bookmarks, we'll consider it.

By the way, a little tip which heps me to navigate between frequently used notes quickly:

1. Use Prev and Next (green) buttons in the toolbar, using them you can jump to previously opened items quickly.

2. Use Global Search. Just type a word or two which is specific to a frequently used note, and it will let you jump to it quickly. Note: it's convenient to use Boolean search for this, thanks to it you can search for words that are not following strictly one after another.