For Cdim7, go into "Display Options" and select the box "Treat dim chord as a diminished triad instead of Cdim7". You should now be able to enter both Dim and Dim7 chords that will display properly.

Additionally, it seems to me that a C79 is really a C9, since the 7 is included in a C9 chord, unless you meant a C7 with a flatted 9, in which case you would enter C7-9.


John

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