I have a Harmony 650 and don't seem to have that button. I used the Telus remote and after I figured out that you have to use the Options button when the initial menu was showing, it worked fine. It seems to me that the "E" button next to the zero on my 650 used to do something. Now it doesn't seem to do anything. This remote is getting a little long in the tooth. Perhaps the key is defective. When I was in there with the Options button, I was also able to set the Guide to only show subscribed channels. I used to be able to do that before too, and now can't seem to with this Harmony remote.