In Visual Studio 2008 I somehow dragged around my tool windows so that now
- Solution Explorer
 - Database Explorer
 - Class Explorer
 - Properties
 
are all in one long vertical tool window on the side. Now matter how I move them around, undock, unhide, hide, dock them, I can't get them back to how they were.
What do I have to do so that:
- Solution Explorer
 - Database Explorer
 - Class explorer
 
are on the top half on the right, and:
- Properties
 
is on the bottom half?