How to convert Hanja with ibus?

[Warren Togami]

https://bugzilla.redhat.com/show_bug.cgi?id=487269
This bug was closed because Hanja conversion was implemented in 
ibus-hangul, but how are you supposed to use it?  The regular hotkeys 
Right-Alt and Right-CTRL seem to do nothing.

On the topic of hotkeys for Korean, is the Hangul/English button and 
Hanja button in the positions of the Right-Alt and Right-CTRL 
respectively the same keycodes with a different label?

Warren Togami
wtogami at redhat.com