Use Caps_Lock as an additional Mod4
I'm trying a new shiny keyboard, where "new" means "vintage" and "shiny" means "yellow with age" and "if I use it to kill a zombie it won't show any marks"; everything looks fine, but it's missing a Mod4 key, which I have extensively used in my fluxbox configuration.
It has, however, the UselessKey, so I've duckduckgone around trying to adapt the common instructions to switch CapsLock and Esc / Ctrl, with limited results, until I've sumbled on the ArchLinux wiki where I've found the following line, which makes the Caps_Lock key (keycode 66) work as a Super_L (and as a Caps_Lock if shift is pressed, which may be vaguely useful someday).
It has, however, the UselessKey, so I've duckduckgone around trying to adapt the common instructions to switch CapsLock and Esc / Ctrl, with limited results, until I've sumbled on the ArchLinux wiki where I've found the following line, which makes the Caps_Lock key (keycode 66) work as a Super_L (and as a Caps_Lock if shift is pressed, which may be vaguely useful someday).
keycode 66 = Super_L Caps_Lock NoSymbol NoSymbol