Turn the mouse into a left-handed one (switch the left and right
buttons).

#+BEGIN_SRC fundamental
  pointer = 3 2 1
#+END_SRC

Turn the right Alt (AltGr) into a regular Alt.

#+BEGIN_SRC fundamental
  remove Mod5 = ISO_Level3_Shift
  keycode 108 = Alt_L
  add Mod1 = Alt_L
#+END_SRC

Turn the right Super key into a Hyper key.

#+begin_src fundamental
  remove mod4 = Super_R
  keycode 134 = Hyper_R
  add mod3 = Hyper_R
#+end_src