title: How to stack editors in Xcode 4
body: <p>Xcode 3 had the nifty widget <a href="https://i.stack.imgur.com/RGtcN.png" rel="nofollow noreferrer" title="Split screen widget"><img src="https://i.stack.imgur.com/RGtcN.png" alt="widget" title="Split screen widget"></a>
   that split an editing screen in two.  I don't see that in Xcode 4.  Has Apple decided that I don't need that anymore? ;-)</p>