Sorry. I get caught up with this every time it seems, and am unable to remember, even though I have configured this over and over!
My excuse is just that it’s completely illogical to me to have two different places to set fonts in the program, with no reference to it that I could find in the manual, or on either of these dialogues. Or there’s another excuse that I can’t recall. 
The Chord Symbol font settings are in
Preferences>Event Display>Chords and Pitches.
