This command lets you switch the member buffer to another class. It
reads the name of the new class from the minibuffer with completion.
C b
This is the same command as C c but restricts the classes shown in
the completion list to immediate base classes, only. If only one base
class exists, this one is immediately shown in the minibuffer.
C d
Same as C b, but for derived classes.
C p
Switch to the previous class in the class hierarchy on the same level as
the class currently displayed.
C n
Switch to the next sibling of the class in the class tree.