I like having only my image on screen. With multi-window mode, you can press the tab key to make tools windows appear/disappear. When you're used to change too

I like having only my image on screen. With multi-window mode, you can press the tab key to make tools windows appear/disappear. When you're used to change tools via keyboard shortcut (and thus, don't need tools window most of the time), it's a great benefit.