Messing around with MConfig, I noticed that with an 861, once one had set up a 7 speaker layout, it was possible to have additional analog height speakers above the listener. I can't find anything in M's literature or manuals that refers to this. Can anyone point me in the right direction?

Main System: Trinnov Altitude 32-8-16, 271, 2 x 8KXE, 1 x 8KPP, 6 x M6 Surrounds, Rel No.25, Oppo 203, Zappiti Pro 4K HDR, Roon, WiiM Mini.