TUTOS notes are small pieces of text that can be attached to nearly all Objects in TUTOS.
On a detail page of a TUTOS object you will see a link on the navigation menu called "Add Note". Clicking on this link will open a page where you can enter the note and a short headline which should describe the content of the note.
This article gives hints on how to install, maintain and customize the notes module.
Notes are enabled by default and do not require additional steps to use.