I have been having a fiddle around in Alpha 3, and yesterday during my first play, I managed to move the entire patch of trees, bushes and rocks at the park entrance as a single item and duplicate them together. Next time I played today, I tried moving them again and there seemed to be no way of moving anything other than one item at a time! According to posts I've been reading, what I did yesterday, isn't even possible unless they were part of a building. How on earth did I manage it? I've been trying to replicate it for ages today and can't. I'm at a total loss!