title: Xcode 8 Vary Traits with autolayout issue
body: <p>Ok I've finally taken the plunge into autolayout using Xcode 8.</p>
  
  <p>I might conceptually have the wrong idea. However I have a view in IB which has 2 labels a button and an imageview dead center in the view with dimensions 300 x 300 for 6plus and 6 devices.</p>
  
  <p><a href="https://i.stack.imgur.com/AfGGH.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AfGGH.png" alt="enter image description here"></a></p>
  
  <p>What I want to do is vary the imageview size for iPhone 5 (SE) so I click Vary for Traits and select height and width then change the values to 150 x 150 click done and the all looks good looking at iphone 5 (SE).</p>
  
  <p><a href="https://i.stack.imgur.com/VKkKr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/VKkKr.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/nvC3X.png" rel="noreferrer"><img src="https://i.stack.imgur.com/nvC3X.png" alt="enter image description here"></a></p>
  
  <p>Now flicking back to 6plus and 6 its also resized to 150 x 150 but I want the image size to remain as 300 x 300. Again I may have the wrong idea completely.</p>
  
  <p>I thought the whole point in this is that its varying the size dependant on what is selected i.e. varied.</p>