[ghmerrill]

Okay, I got those sorted out.  Rendering setting solves that loading problem.  I'm unclear on how the Fullscreen mode got changed.

In addition to that, I then noticed that the touch actions weren't working correctly (and scrolling actions weren't either).  When I restore a backup to the Windows system, it appears that default values are being used for these.  When I restore the same backup to my Chromebook, I see the expected settings and behavior for touch and scrolling.  The boxes for "Enable pinch zoom gesture", "Enable tap to turn pages", and "Enable swipe to turn pages" are also all checked in the Windows instances but unchecked in the Chromebook instance.

I have carefully done this twice, restoring from the SAME file on my Google Drive.  The Chromebook instance is restored correctly (with the expected Touch Action Settings) while the Windows instance is restored to (what appear to be) default values -- completely different.

I have even copied the backup file from my Google Drive to the local Windows drive and restored it from there.  Again, it does not restore the correct Touch Action Settings.

Any idea on how this could be happening?  Can I back out my Windows update to the earlier version and try that?

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Ah, I see now that this is a long-standing known problem.  I just needed to find the right search phrase for it.  I suspect the Fullscreen Mode setting was a consequence of the same issue.  I've seem to have fixed it now in the most straightforward way and will know what to do in the future -- and will now probably take the added step as a precaution when saving/restoring in order to avoid any unwelcome surprises.