Where does one go and set the modes in the controller software? I don't see it under Config -> Radio. I'd like to do n/ac only or perhaps ac only.

I'm converting my 3700 sq foot home in the US to have something that supports seamless roaming and band steering. Currently I have the 3 Airport Extreme's on 1, 6, 11 for b/g/n, and 36, 132 (DFS?) and