Insert new note: F9 + number 2 above the letters on the keyboard.
Remove parenthesis ( and ). Set cursor in front of the parenthesis: F9 + r.
Remove the entire note: F9 + u.
View the contents of all notes: F9 + e. Remove selection with F9 + n.
See text without notes: F9 + b
Remove all notes: F9 + t
Selected text and put in a note: F9 + p