"Scale Effect (Shift+Alt+Up)
The scale effect is like the OS X "All Windows" Exposé
feature that is invoked with F9. It shrinks all the windows down to
fit on your desktop so you can see a thumbnail of everything
running to find the window you want. This feature is most useful
when you have lots of windows open. The more windows you have open,
the smaller each thumbnail gets. It also puts the application icon
down in the corner for you to help with identification of
applications."