Matt; Yes there are many buttons to select the various modes, but this one is off to the side & indicates 6.1/es (in orange)which relates to the DSP slider switch above. also (in blue) below it indicates chp/index which relates to the 10KEY/DSP slider.
I will research all this via Yamaha to get better details - or at least SOME details where the powers that be have deemed the manual does NOT need details.
I'm still left wondering why the DSP functions don't use the centre rear as well? ALL other speakers are used in all the settings except for the centre rear? what the heck if they use the proprietary (+2) front effect speakers in ALL modes,I wonder why not the centre rear as well??
Dougofthenorth (:~}