I found it in Help just fine, you might want to look again,
but here is the basics:
Go to the Dims/Notes Tool Set.
Using the General Notes Tool, which looks like a comic book quote,
Click on the drawing to place the Note.
Now Notes Manager opens,
at the bottom, hit Show Database Controls,
Click on the note you want, and hit Add> to include that note in your list.
Note that you probably, if not definitly, should not want to use any of the built-in notes, they are really just examples, you will want to write your own and add them to the database if you are going to use the Notes Manager.