I guess what I was referring to as a 'button' is actually called a 'pin'.
Was reading up and found the Tools > Overlay > Always Show,.... Had been somehow turned off. Problem solved....Whew.
The [ H ] key toggles it on and off too. Maybe that is how you accidentally turned it off?
Yes, Rikk, just tested it and am guessing that's what happened. I thought, in your previous post you said it was control/H but "H" by itself is both convenient and bothersome.
Thank you for chiming in,....