"More generally, to change a particular key signature for a transposing instrument enharmonically from 5, 6, or 7 sharps to flats instead: use Key Signature transposition, add 1 to Interval, subtract 12 from Key Alter, and uncheck Simplify Key. To change from 5, 6, or 7 flats to sharps instead: use Key Signature transposition, subtract 1 from Interval, add 12 to Key Alter, and uncheck Simplify Key. This may unwantedly alter other keys in the piece, however, in which case the above should be applied via a staff style only to the section of the music that’s in the key to be changed."