Upper right portion of OBS screen covered by monitor view (desktop or previous open view)

[obs-study-22]

Help, please. I'm worried I changed some display setting on my laptop. The upper right portion of OBS screen covered by a monitor view (desktop or previous open view). Attached is a screen shot. The last page up here was my Settings>System>Display. There is a little part of the OBS screen visible (left upper) where I can see and manipulate part of the image from my video device. what did I do? How to eliminate this monitor image? The OBS "help" menu is covered by this display so I don't know how to upload a log.
George