To copy a table in the diagram...
- Right-click on the header part of the table and select Copy table.
- Right-click on a blank space within the diagram and select Paste.
- On the Rename table paste dialog, enter the Table name and click OK.
- The new table will now be displayed in the diagram.
- Double click on the table header to display the Properties dialog. Make the necessary modification. Refer to Entity Properties Window for details.