They are on mine. They are links, though, not buttons. I never noticed any buttons...
I think when they use "buttons," they're referring to "links."
<<<does that all the time, when asking questions in this computer forum, unwittingly substituting the more-accurate word for one slightly less accurate.
I thought perhaps I see them because I'm a moderator--the screen shows up differently according to one's position here, and was going to check to see what it looks like as a member.
Oooops, I have no member account so that I can see. Sorry.