better to have fretboard note labels option for showing : - note e.g. A, A#, B, etc - interval e.g. R, m2, M2, etc - degree e.g. 1, b2, 2, etc **ref** https://en.wikipedia.org/wiki/Interval_(music)#Main_intervals https://en.wikipedia.org/wiki/List_of_musical_scales_and_modes
better to have fretboard note labels option for showing :
ref
https://en.wikipedia.org/wiki/Interval_(music)#Main_intervals
https://en.wikipedia.org/wiki/List_of_musical_scales_and_modes