Advanced settings under properties

Running V (5.12.50810.13095, 8/10/2015)
I noticed that the backside color which I had previously set was not in play in the file that I am using. I went into properties looking to reset the backside color to something different from the frontside color. I now cannot find the advanced setting that I had previously used to set the backside color. Did I do something to hide this or was this changed in an update?

Document Properties>Click +next to View>Highlight Shaded mode>Single Backface Color