Don- is there a decently visual indication on the screen if no light?

I think you need to go into the VH menu to see it?

No indicator that I have found.

So there's no quick reference from the home screen or indicator light on button? I use a foot pedal and like to see the light peripherally to confirm the switch was depressed enough and that I hit the right switch. A lighted button isn't an expensive option. I believe ketron has same issue on sd7 and similar?

At least Ketron SD40, and I suppose the SD7, has a small display saying it is on or off.

Older Yamaha arrangers had the VH light on deck if I remember correctly psr3k?

S970 didn't have it.

I said Old... Lol

So the signal-Mic setting/vocal harmony button to the right of the touch screen, that looks like it has an led in it, does not engage/disengage the vh and light up?

Sparky did your order a SX900 also?