I was on an older Blender and finally updated, and I took some time off from it so learning all over again, but I seem to remember (and noted) that in quad view, if you put your mouse over a certain view, when you toggle quad view again that’s the window that will become full screen. But it doesn’t seem to be working. Did it change?
From what I understand, it just doesn’t exist anymore. Now it always goes back to the non-ortho view. Apparently people were getting confused about how the old way worked.