If you're using remere's map editor its when you use Terrain or Doodad and just drag the tile around to make it more comfortable trough it looks really messy when you do like that.
Its a good start but you may wait to post screens/upload and check out some tutorials before if you doesn't like critic critism, since this guys is only telling the truth and i/we wont lie to you and tell its super great et cetera, not many however. ^_^