I'm a Premium user for professional and personal use. I have shared individual notes with different people who have their own accounts and later discovered a note was unintentionally deleted by one of those users. To date, I was able to find the deleted note in the Trash, but it would be a great service if we could mark individual notes in any manner: a lock, a pin, a color. Any of these features currently available across computer operating systems and software would help keep important notes from disappearing or being modified unintentionally. If there is a way to do this already, please share it.