Q: Is it possible to separate two pools (save empty place between them)? And is it possible to include 2 sweemlines in 1 pool?
A: Yes, it is possible. Just put a swimline little bit higher or below the other, when you cteate it. You can add even more then two (three, four...) smilines in one pool. Just drag smimline from pallet tool and drop it in pool. Don't forget to change pool's size so you can see all smilines insede it.