TL;DR
In the toolbar, the extended info mode is called “Alt-mode” in the 'controls' settings it is called “Show info”What ?
I think neither of these are very good names - especially "Alt-Mode": I don't have it bound to 'Alt', so to begin with I didn't know what it meant."Show info" is also not particularly descriptive.
I propose "(show) extended info" in both places instead.