Board Thread:Suggestions forum/@comment-26410366-20160731144801/@comment-27219153-20160806034831

I believe control + middle click has a similar function for command blocks in 1.8 (correct me if I'm wrong). I think it should be control + middle click to get an exact copy of the spawner, and just middle click to get a default spawner, that way you can easily choose which one you want.