title: Cannot change custom UICollectionViewCell in Storyboard
body: <p>I have a <code>UICollectionView</code> with custom <code>UICollectionViewCell</code>s. I used Interface Builder (via XCode 8) to size the collection view and cells when first making it.</p>
  
  <p>Now, I'm trying to adjust the size of the cells and I'm unable to do so in Interface Builder (using XCode 9). I cannot adjust the width or height of the cells on either the collection view itself or on the custom cell. The up/down arrows don't do anything and neither does typing in a value. It just stays set at 145. </p>
  
  <p>I saw some answers about not being able to do this with a <code>UICollectionViewController</code> via Interface Builder, only a <code>UICollectionView</code>, but it is a collection view and not <code>UICollectionViewController</code>.</p>
  
  <p>I'm sure there's some new setting/config in XCode 9 that I'm missing, but I can't figure out why I can't adjust the custom value. </p>