Two days ago I was working in ArcGIS online without a problem, experimenting to see if it met my needs for collaborative mapping projects. Beginning yesterday, the Edit option no longer appears on any map when I sign in to ArcGIS online. I have deleted maps and started over thinking that maybe I had somehow revoked my own privileges on the layer.
I even tried creating two accounts--one with Google and one with Facebook--but I'm getting the same problem where there's no Edit button. All I am trying to accomplish is dropping markers on a map. In order to do that, I need to have the Edit option. (see screenshot)