In the notes editor you can add and format text in your note as you would in any word processor. Once you're finished creating your notes, click the “Save and Exit” button to save your changes and close the address notes editor. You can always reopen this note by clicking on the updated address link.
Once you close your address editor, the note will be displayed in your Address Book view if you have selected it to show in your customized Address Book display. You can add up to 20 pages of note text to each listed address.
Learn more about formatting your address note text.