Copy of document appears within document

While editing a document, suddenly a copy of the screen appeared in the middle of the document and I can’t get rid of it. It looks like a slightly blurry enlarged screen shot, I sits there, and if I hit delete , instead of going away, white space appears between it and my text. Closing Scrivener and then reopening it did not help, This happened once before and I cannot remember how I got rid of this annoying image;.