Mhedges, Yep, I found that out. The Panasonic has not been delivered so I did not have owners book but got an answer from Panasonic help line.
Looks like no way for the TV remote to control their own speakers plus another pair in the room. Seems like for a screen that large, that would be an attractive option. I was going to buy a cheap two channel integrated, set the volume where it balanced nicely with the TV speakers and then control all with TV remote.
Any other way would mute the TV but not the alternate speakers, bad idea for broadcast since they flood us with commercials and the more expensive V10 Panasonic with digital and analog outputs has same limitations.