The Compose key in in X11 does the same, but globally. I think it's not bound by default; I have it on the right extra Windows key. Compose, then 1 then ^ gener

The Compose key in in X11 does the same, but globally. I think it's not bound by default; I have it on the right extra Windows key. Compose, then 1 then ^ generates a super-scripted ¹. /usr/share/X11/locale/en_US.UTF-8/Compose has a list, mostly filled with obscure stuff like ㊷.