Device map lost

Hi,  Between zooming and panning, I have lost the device map.  We zoomed in to see the intensity percent readings on the map, and then panned around.  The motion was a bit uneven, and then the map got lost.  I can't tell if it is zoomed in too far, out too far, or panned off the screen.  The rest of the functions are working normally, and the device map works normally in other saved shows.  I would like to know how to recover the map in this show.

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