To subdivide a database diagramDatabase diagrams can range in complexity from just one table to hundreds of tables. When you are working with a large number of tables, you can create a “master” diagram that contains all the tables you need, and then divide the master diagram into many smaller diagrams or “subdiagrams.”
Subdivide a diagram when you want to isolate a group of tables. For example, if you are designing an application with many modules, you can create one master diagram with all the tables that the application needs. You can then subdivide the master diagram so that each subdiagram contains only the tables pertaining to a specific module.
Because each table that appears in a database diagram is merely a reference to a database table, you need to edit the table in only one diagram in order for the changes to be immediately reflected in each diagram in which the table appears.
To subdivide a database diagram
