I'm pretty sure this had a button there in like Windows 3.11 or 98, that I think was later hidden so you'd just click the title bar to get it?
Edit: https://www.functionx.com/windows/Lesson06.htm
You'd click the application icon in the title bar, then in WinXP you could reach it by right-clicking anywhere in the title bar.
And in the Windows 3 era, it was an actual button (IIRC the minus on the left wasn't minimize, it was this menu, and the down arrow on the right was minimize): https://www.computerhope.com/jargon/w/win3x.htm
ALT+SPACE, M, arrow keys is forever in my brain due to so many poorly behaved programs which would open their window somewhere off-screen, and that was the way to move them back onto the screen.
Happens quite often with dialog boxes that pop up to inform you of some error. Particulalrly if you're working on multiple screens and have moved the application off your main one. (Which is what at least I tend to do when working on a laptop attached to one or more external screen/s.)
[1] http://the_messenger3.tripod.com/refwine1.html#ControlMenu Behold Ye Olde Intrrnet haha
Still there, even in Windows10. (And AFAICR even W11; only used that a couple months last year.) It's called the System Menu, IIRC. If you see nothing to click, try pressing [Alt]-[Space] -- even MS Office apps, which have gotten rid of the icon, still pop up the menu.
> And in the Windows 3 era, it was an actual button (IIRC the minus on the left wasn't minimize, it was this menu,
I also called it "the big fat hyphen" when I first started using Windows 3, but AIUI now, that was actually supposed to be a picture of the space bar. As in, you know, [Alt]-[Space].
A pic of the old Windows 3.x Program Manager with its Program Groups within the Multiple Document Interface, linked somewhere in this thread, reminded me: Sub-windows within an MDI had a shorter bar for an icon, and IIRC you got the system menu (document menu?) for the focused one by pressing [Alt]-[hyphen] (or [Alt]-[minus]).