Thanks, Barry, for your quick reply. It helped me locate the problem, but not to solve it.
When I INSERT > SECTION at page 7 from the toolbar, the page thumbnails blink. But there's no indication that the section includes anything but page 7. Pages 8--- are supposed to show a pale colored background, but they don't.
If I open the FORMAT inspector, I don't see SECTION.
SECTION is located in the DOCUMENT inspector.
There I can uncheck "match previous selection," but I can't change to "page numbers start at . . ." because it's grayed out, as is START AT (page number).
Should I take this to "chat?"
I'm working in Pages version 7.2 5869, if that's helpful. Thanks, John M