Shown in this photo is the master power button, main zone power button, and the headphone jack.
The reason there are two power buttons is that since the RX-V863 has both a main zone and second zone function, you can actually turn off the main zone and still access the second zone. For the eco-conscious, this is a power saver as you don't have to have the entire receiver running if you are just using the Zone 2 function.
Also featured in this photo is the headphone jack. The Silent Cinema designation means that when you connect any ordinary pair of headphones you experience a surround sound effect via Yamaha's proprietary Silent Cinema audio processing.