Make Menu button Hyper or (Super)

https://radu.cotescu.com/remapping-keys-in-ubuntu-14.04/

/usr/share/X11/xkb/symbols/pc

Find <MENU>, change the right from Menu to Hyper_R

Change

modifier_map Mod4   { <HYPR> };

to

modifier_map Mod3   { <HYPR> };