You can put notes into your database diagram, to describe the database diagram and its objects. These can include headings, descriptions of the tables and their contents, and any other information you want to place in the database diagram.
Add annotations to a database diagram
Change the font of the annotation
Note All text in the text annotation box will be changed to the new font.
Arrange the text annotation in a database diagram
Note You can only use the ANSI character set in an annotation; you cannot use Unicode characters.
Tip
You can use annotations to describe the relationships between tables in your diagram. However, you can also generate relationship labels automatically.