title: Working with overlapping objects in storyboard
body: <p>I'm working on an app where one of the screens will have a partially transparent overlay in some situations. I'm using a Visual Effect View for this.</p>
  
  <p>I now simply have this visual effect view on top of the other UI elements in my storyboard, but this means having to move it out of the way whenever something else in that view needs changing. Is there a good way to edit such a “sub view” without having it actually be in that view controller's view in a storyboard?</p>
  
  <p><img src="https://i.stack.imgur.com/Ue8Bu.png" alt="An effect view overlaid on top of some elements"></p>