Default behavior for Windows applications (since 3.x, I think). Alt-Space brings up the Window menu.

Some odd-ball apps will replace it with their own menu, but few apps go to the effort to override the default shortcut it, even if they otherwise hide it.

Works on windows for me. Also never really thought about this for rescuing a stuck window, I've always used winkey + arrow keys and kept mashing buttons until it appears on one of my monitors :P

Alt-space menu is Windows specific IIRC.

Motif/CDE, +/- 1990.

https://docs.oracle.com/cd/E19683-01/806-4743/6jdq6q20i/inde...

It makes sense since Motif was based on OS/2 Presentation Manager which was also the basis for Windows 3.1's look.

Gnome does the same, I use it all the time for "pin window always on top"

Which windows still doesn't have, for some reason.

Gnome doesn't have menu accelerators in the window menu though, so "alt-spc n" does nothing: the alt-spc brings up the window menu, but the n doesn't activate "minimize". This interaction not functioning in Gnome keeps me off Gnome entirely.

super+h minimises. pretty sure you can make it anything you want.

if you're looking specifically for "alt-spc n" to minimise I'm sure you can find a way to make that work - but why? to retain muscle memory between windows and gnome?

My keyboard doesn't have a 'super' key. What does that translate to on a normal keyboard?

Windows key, but like I said you can change it to anything you want.

I'm pretty sure there's an option to emulate the windows key somewhere too

I think openbox uses it as well.