How can I see the parent classes from this doxygen documentation?

How can I see the parent classes from this doxygen开发者_高级运维 documentation ?

I need to know which are the superclasses of a specific class (CPImage).

http://cappuccino.org/learn/documentation/class_c_p_image.html

But I'm only able to list che classes.. without knowing relationships between them.

thanks

They/he seem to "forgot" to generate a class diagram (what is possible with doxygen). I only found a diagram for the file reference.