I tried to dig out some of these undocumented commands, but didn't get very far. Feel free to add to the content or comment. Talosi's Command Reference Library
Another elegant way to rotate keybinds is to use the ALIAS command and the COMMANDALIASES.TXT file. I detailed this approach earlier in a (now archived) post here and here.
One way to do this is with the ALIAS command and the COMMANDALIASES.TXT file. I detailed this earlier in this thread in a (now archived) post here and here. @talosi