Although a schema inherits all classes and their associated properties, methods, and constants from its superschemas, these inherited classes are not displayed by default in the Schema Inspector dialog of the subschema. Instead, for the sake of clarity, only classes local to the schema are displayed, as well as any superschema classes to which subclasses, methods, or constants have been added.
To display superschema classes in the schema hierarchy
Select the Superschemas command from the View menu.
The View Superschemas dialog is then displayed. The current schema is displayed in the Show classes and methods defined in: combo box, by default.
Select the superschema whose classes you want to display in your Schema Inspector.
When you have selected the appropriate superschema, click the OK button.
The classes list box of the Schema Inspector dialog is then populated with all of the classes in the specified superschema. (Classes defined in a superschema are displayed in red and those defined in the current schema are displayed in black.)