The Entity Relationship (ER) Diagram Generator helps users achieve a better understanding of their database schema by displaying the structure in a graphical format. To view an ER Diagram:

1. Launch the ER Diagram Generator dialog by:
   • Selecting Tools -> ER Diagram Generator from the Menu Bar OR
   • Selecting Tools -> ER Diagram Generator from the right-click pop-up menu on a database object in the Schema Browser
2. Select a Database and Schema (or All Schemas)
3. In the left panel, select one or more types of objects to be scripted (Tables, Views or Both).
   Click the green check button to select all and the red X button to deselect all.
4. All objects matching the selected schema & object types will appear in the right panel. Select one or more objects to be scripted.
   Click the green check button to select all and the red X button to deselect all.
5. Click Next to generate the diagram
6. Once the diagram is generated, the ER Diagram Viewer will open and display the new diagram.
7. To change the layout of the diagram, select an entry from the Layout dropdown list.
   Supported layouts include:
   
   • Box
   • Circle
   • Hierarchical
   • Tree
   • Radial Tree
   • Moen
   • Fruchterman-Reingold (FR)
   • Annealing
   • Inverted Self Organising Map (ISOM)
8. The Entity View drop-down list determines the amount of detail displayed for each entity in the diagram. Select Full to view all attributes or Header to view only the entity name.
9. To save an image of the current diagram, click Save Image As.
10. To print a hard-copy of the current diagram, click Print.
11. Click on an entity to display more column & constraint detail in the lower left panel.