What do you call a computer window when it is not maximized or minimized?

Solution 1:

In Windows, the verbs are Minimize, Maximize and Restore Down.

In official documentation, Microsoft uses restored but also normal.

A WindowState that determines whether a window is restored, minimized, or maximized. The default is Normal (restored).

Solution 2:

Java refers to the possibilities as iconified, maximized, and normal.

Solution 3:

"Windowed" exists too, but it might be specific to computer games, which run either windowed or fullscreen.

Solution 4:

GNOME uses unmaximize in their official documentation and it's the only term I've ever heard. I can't imagine any more precise term.

Derived from that, unmaximized is your word.