Tutorial
Getting Started
Creating new Entity Relationship Diagram (ERD)

- Inside of Oracle SQL Developer select menu Tools -> Schema Visualizer.
- Select File Name and Directory where diagram will be stored.
Adding Tables to a Diagram

- Inside of Oracle SQL Developer connect to a database of your choice.
- Expand Tables node.
- Select tables you would like to add to a diagram.
- Drag selected tables to a diagram and drop them.
- Optional you could Auto-Layout tables with help of
button from the toolbar.
For further explanation please look in other parts of Tutorial.