How can I Change hero station. I want to put a different hero in a different spot. Can I do this?

Each time you get a hero they will go from grey to color... you can't move them, but you can garrison (activate hero) or recall (remove). How many you can garrison will depend on your Town Halls lvl. At lvl one you start with 10 leadership and each hero cost so many depending on the hero... green heros cost 1 point to garrison, blue 3, purple 5 and finally 6 for orange. Your leadership caps out at 100 with lvl 25 town hall.