I have been working on a model with no issues until now. I added a label, then decided I wanted 3D text there instead, so pressed Ctrl+Z to undo it. When I selected the 3D Text icon, the entire window went inactive.
If I click on the window now, the floating toolboxes appear but I can’t do anything with them. If I click on them or anywhere in the main window, including toolbars, menus, or the title bar, it chimes at me. The title bar is white instead of the normal blue-grey, indicating an inactive window.
Enter didn’t work, but Escape did. I think you’re right with the off-screen thing, but I’m not sure how it happened. That did remind me, though, that the Welcome window did the same thing. After waiting for a while for it to appear, I gave up and just closed it from the taskbar. A few seconds later the model window appeared.
Using Win+Arrows was unsuccessful, even though it normally works on my system. I looked up the shortcuts for my monitor manager and they worked to bring the hidden windows back. Thanks for setting me on the right path DaveR!