Animation states mindmap within animator controller kept moving

It just kept moving, to an extent where everything just disappears.
Now I don't even know where are those animations, and I can't edit them because it's gone.
What should I do? It moves a lot, and I think I have spent too much time (probably 100+ times) moving them back to the middle of the screen.

I can't scroll vertically in the animation controller, so everything just got stuck in somewhere-out-of-reach.