title: Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
body: <p>I just noticed the iOS 6/7 Delta property found under the UIView's structs layout.</p>
  
  <p>What is this for and why is this missing from AutoLayout?</p>
  
  <p><img src="https://i.stack.imgur.com/E7Su3.png" alt="enter image description here"></p>