title: How to reorder single tile groups within a tile set of SpriteKit?
body: <p>In Xcode's SpriteKit, a "Tile Set" is a collection of "Tile Groups".</p>
  
  <p>In the editor, these Tile Groups appear in a certain order (top to bottom) based on the order in which you created them.</p>
  
  <p>Two questions:</p>
  
  <ol>
  <li><p>Is there a way to RE-ORDER the Tile Groups within a Tile Set?  I've tried dragging them within the Set, but that doesn't work.</p></li>
  <li><p>When I DELETE one of the Tile Groups, it causes a problem in all scenes using that Tile Set.  Specifically, it appears that any Tile Groups that are later (lower) in the list than the one I delete shift in the scenes to be ONE GREATER than their previous position.  E.g., what used to appear as Tile Group #12 will now appear as Tile Group #13, and so on.</p></li>
  </ol>
  
  <p>I've search here in SO and via Google but have not seen anyone describe this.</p>
  
  <p>Thanks.</p>