[ghmerrill]

Okay.  The problem was that I did have "Full screen" rather than "Fit Screen" set.  Having changed that, I can pinch and zoom pages successfully.  However, I also have both Zoom Settings and Pan Settings set to "All Pages in Setlist".  But only the page that I do the pinch zoom on is affected by that.  The others appear to be totally unaffected.

It is true that the pages are of differing sizes since they've all been cropped.  Is that inhibiting the setting of one being propagated to the others?

There are less than two dozen pieces in this setlist, and so doing each individually isn't overly burdensome.