title: How can I enable vertical split views in the Xcode IDE?
body: <p>I'm diving into iOS development and I'm using Xcode on a multi-monitor setup.  </p>
  
  <p>Obviously I want to take advantage of the multiple monitors to view and edit multiple panes of source code, but I'm having a hard time figuring out how to enable vertical split views.  In other IDEs, it's just an option you click in the "Window" menu.</p>
  
  <p>How do I enable vertical split views in Xcode?</p>