fallback mode panel, keybinding for changing properties

[Michael Schmitt <tcwardrobe gmail com>]

Hi list,

I have several machines without a super key, but super+alt+right mouse 
button is used to access the context menu on the panel. I've read in 
several places for some users it is just alt+right mouse button, dunno 
but on Debian it is alt+super+right mouse.
So, how do I change the key-combination to some other keys?

greetings
Michael