title: "Freeform" size in IB - Storyboard
body: <p>As I understand and tried, if I change the simulated size of the ViewController in the storyboard it will still stretch its main "view" property to the whole screen. </p>
  
  <p>So my question is when and why should I change this "Freeform" property?
  Whenever I needed to make some overlay, I just make the main "view" transparent and create another view on top of that with my content, then I present it I do it as a container.
  As I see there is no need for it, And I couldn't find anywhere in Apple documentation about it.</p>