Let you want todo reverse engineering, i.e. visualize some existed tables and links on a new diagram. Let you want to expose on a diagram some family of linked tables. You add the first table and meet problem. You usually don’t know/remember which other tables are linked.
Now you have great help on this step. In the contextual menu of Table, in the model find command “Add Linked Tables …”.
It will show you dialog where you can select all or some linked tables, click OK and see linked tables.