When I edit the fingering of one chord diagram, must I repeat the process for all of the chords that share the same spelling? Is there a way in which I can edit a chord diagram for say an Em, and then all of the other Em’s in the piece will convert to that edit?
Yes, use Copy Shape to Matching Chord Symbols. You can find this in the right-click context menu, or via the jump bar (hit J and start typing the command name).
What a time saver! Many thanks, once again, @dspreadbury.