Issue on Window arrangement

So I was making an animation, and I went to the window with things like assets, library, etc. on the right. For some reason (idk how) I managed to remove it. When I managed to get it back, the window, (formerly the one on the right) covered my WHOLE entire screen, and minimized the timeline window on the bottom. Is there a way to reset the window arrangement to default settings (as they were when I installed it?)