How can I see the columns and the foreign keys of the tables in Toad Data Modeler?
Entities can be displayed in four different display levels:
1. Entities (only entities are displayed)
2. Primary keys (diagram shows only entities and its primary keys)
3. Keys (all keys are visible)
4. All (all attributes are visible)
You can change the display level in the dropdown "Attributes" located in the "Display Mode" toolbar (or right clicking on the model)