Duplicating tables in the relationships graph
You can duplicate tables, groups of tables, and any direct relationships among them. Any options you have set for the relationship (for example, a cascading delete) are also duplicated.
To duplicate tables and direct relationships:
1.
Open the relationships graph for the database.
See Working with the relationships graph.
2.
In the relationships graph, select the table or tables you want to duplicate.
3.
Click Duplicate table button.
4.
To rename a duplicated table, click Edit button and type the new name of the duplicated table in the Specify Table dialog box.
Notes
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Duplication preserves the relative positions between the original tables. By default the duplicated tables are placed below and to the right of the original tables.
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You can also duplicate text notes.
Related topics 
About relationships
About the relationships graph
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