I want to make this script.
Ctrl + mouse over --> Note !
Tell me how
those type of notes are called, Autonotes
you can edit your local files, but as zbrush system files you cannot redistribute your own files.
have a look at Zdata/Zlang/english/Autonotes.txt
you can add your own notes, it gonna works after you restart zbrush but as explained above, you should not redistribute these files
as user I will not install a plugins which provide modified system files.
It was very helpful.