Typically, a score and its parts show identical information. Sometimes, however, it is necessary for the score and parts to show the same notation in different ways. A transposing part is a good example of this. Enharmonic pitches in the part is another.
Finale has a great Enharmonic feature which allows you to create an enharmonic unison for specific notes. The same pitches are enharmonically spelled differently in the part to allow the part to be read more easily.
In the Part, enter the Speedy Edit frame, select the pitch you want to change, and type 9 on the keypad to change the pitch to its enharmonic equivalent without changing it in the score.
Occasionally, it is necessary for significantly different notation to represent identical passages between the score and parts.
more >> “More Advanced Alternate Notation Techniques in Finale”