Modeling Database Objects Offline
You can create offline database definitions based on objects that exist in a database schema in one of the following ways:
Using Drag and Drop: You can drag tables, views, synonyms and sequences from a database schema onto a database diagram, where they become accessible as offline database objects.
Using Import with Filters: You can import tables, views, sequences and synonyms from a database schema to an offline schema where they become available as offline database objects. You can apply filters in the wizard to display only the objects that you are interested in, and when there are a large number of objects in the schema you can turn off auto-query so that the wizard does not refresh every time you type a filter character.