title: Storyboard: How do I let Xcode automatically update frames when I change layout constraints?
body: <p>I have seen a WWDC 2014 video (What's new in Interface Builder) where the presenter uses Storyboard and changes the height of a table view cell prototype within a table view controller (at around 7m30s). I see all the subviews of that cell resize as he drags the height-handle on the cell. This is great, because now you can see how your layout constraints behave in different scenarios very quickly.</p>
  
  <p>He doesn't explain how he does it. Because when I drag the height-handle of a table view cell prototype, the frames of all my subviews don't update. They only update when I select from the menu: Editor > Resolve Auto Layout Issues > Update Frames (All Views in Table View Controller)</p>
  
  <p>Is there an Xcode setting anywhere that toggles live-updating the view frames I see in Storyboard, obeying the layout constraints?</p>