As I still can't upload screenshots to forum posts or comments I'm going to try a shared link on Google drive and see if that works.
Newbie question, I guess... From time to time "ghost" frames appear outside document or master pages. I can't move or delete them. They aren't selectable via the Layers palette. Have I done something inadvertently to make them appear? If they're created by design, what is their purpose?
https://drive.google.com/open?id=1z4K75zFoFWjE_-lPfn6-TEDwGumBxcFq