You can format the database diagram in a number of convenient ways. You can:
This is especially useful if you have moved the tables in the diagram or added new tables, and want to clean up the layout of the diagram.
To arrange all tables in a database diagram automatically
To arrange selected tables in a database diagram automatically
To add annotations to a database diagram
To change the font of the annotation
To arrange the text annotation in a database diagram
To add labels to relationship lines in a database diagram
To rename relationship labels
To view a label for a specific relationship line
To zoom a database diagram
To zoom to a selected object