title: position a view in storyboard at 1/3 of screen size
body: <p>I'm trying to position a view in storyboard to always have it top edge at 1/3 of screen size. I have currently set a constraint to Top Layout Guide, but the constraint's constant is...well it is constant no matter which screen size it is used in, but I want it to be 1/3 of screen size. Can this be done entirely in storyboard? Thanks for answers</p>
  
  <p>Screenshot of current state:</p>
  
  <p><a href="https://i.stack.imgur.com/HGhpY.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HGhpY.png" alt="enter image description here"></a></p>