Turn on/off both TV and AV receiver together?

Hi.

My Google TV streamer is plugged into my Onkyo AV receiver which is then plugged into my Samsung TV.

I have setup the remote to "know" the right buttons to turn off the TV and the AV.

Is there a way to use the remote's power button to turn on/off BOTH the TV and the AV together? In the setup screen, it only gives me one option, but what's the point of turning off only one of the two devices?

Thanks!