Developers testing Snow Leopard can also navigate nested folders from within a Stack. In Mac OS X 10.5 Leopard, clicking on a folder from within a Stack would open that folder in the Finder and close the Stack. But in Snow Leopard, users can navigate deep into Stacks presented in grid view, with each parent grid being thrust into a minimized grid window in the upper left-hand corner of the grid as the user digs deeper into the Stack.