Musician automatically transposes chord names in these two circumstances:
|2.||For an instrument part which has a transposed instrument key, Musician automatically transposes the chord names for all of the measures for that part. This is done if, and only if: (a) the part displays only one staff, or (b) the multiple staves in the part all share the same instrument key transposition.|
The transpositions of chord name keys is automatic. This is generally good. However, in rare cases where the spelling of a chord name is ambiguous, such as F#7 versus Gb7, and Musician makes a choice opposite of the one you would choose, Musician currently does not offer an option for you to change that decision.