You can drag tables, views, synonyms and sequences from a database schema onto a database diagram, where they become accessible as offline database objects.
Another way of working with existing tables, views, synonyms and sequences as offline objects is to import them from a database schema to an offline schema. See Using Import with Filters.
To drag objects onto a database diagram:
You can drag more than one object of the same type onto a database diagram, by holding down the Ctrl key as you select them.
Note: If you have already imported the objects to an offline schema, that is the offline database object definitions are already present in the Applications Navigator or System Navigator, the object is created with a unique name.
Working with Offline Database Definitions
Creating Offline Database Definitions Based on Existing Objects
Modeler's Guide
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