That's always been one of my biggest problems. Most of that convenience button stuff never functions or it does something completely different than what its supposed to do.
Same with the pull down menus. Some have lots of choices for things that don't work as well. Lots of gray stuff and little active black stuff.
I have a print screen button and have always had print screen buttons on my keyboards but that doesn't mean any of them ever printed anything.
I have a mute button for my sound. All it does is stop what ever music or video track is playing and put away the player.
All of my F keys have secondary functions as well but I know better than to ever try using them. I have no idea what will happen when I press one but know from experience its either going to be nothing to something completely different than what they are labeled to do.