Ok. I had two problems.
1) I somehow got two copies of the file open simultaneously. When I tried to select the frame for copying, copy was not an option.
Once I sorted that out,
2) when I selected what I thought was the main frame (and, indeed, I had), when I tried to paste into the second frame, I saw offset copies of the two subframes, but nothing of the main frame with its background images and its text.
I finally discovered that I had copied everything, but that the main frame had been copied in place, right over the top of the original, while the subframes had been offset. When I selected again, back over the main frame, and moved the selection, my copy moved. Even better, when I dropped the dragged copy in the new frame, the sub-frame were magically restored to their correct relative positions in the main frame.
Using 4.2.0.2 on OS X 10.9.1 (Mavericks)
Peter West
"Those who are well have no need of a physician, but those who are sick..."