811 SD/HD button on remote?

[Georg Matthews]

I have a new 811 and I see the SD/HD button on the remote and I have tried this button with no results.
Can someone please explain what and how this button is to be used ?
Thanks Georg

 

[BFG]

It's not used on the 811.

It does work as the input changer for TVs

 

[nippjas]

Yup, for future use.