Mac OS X Lion has introduced for the first one the possibility it flies to reorganize an open window in the Finder dragging one any of his/her edges, and not as solo it happened from the angle in before low to the right.
But it doesn’t end here, in fact they are also there some options “hidden” that you/they can be activated using the keys modifiers.
Holding pressed the key Option (halt) while an edge of a window drags him, that opposite is also reorganized.
If instead you hold pressed Capital the whole window is reorganized, maintaining the proportions.
Contemporarily pressing Option and Capital the window of the Finder is reorganized around its center.