To see how a table is related to other tables through Foreign Keys:
You can select among different graph layouts in the layout drop-down list in the toolbar: Hierarchic, Organic, Orthogonal, or Circular.
Other layout settings can be changed in the Graph Control area, which is shown or hidden with the settings toggle button in the toolbar. For instance, you can select how much information to include for each table in the graph: just the Table Name, the Primary Key column(s) or all Columns.
The graph can be Exported to a file in JPG, GIF, PNG, SVG or PDF or Saved as a Graph Modeling Language (GML) file that you can then open in the yEd tool from yWorks for further manipulation.
You can control whether the table names should be qualified with the schema/catalog in the graph.