Choose Window > ScoreManager and click the staff you want to change.
Choose Transposition > Other. The
Staff Transpositions dialog box appears.
Click Chromatic and choose the desired transposition
from the drop-down menu. Or choose Other to create your own
instrument transpositions for less common instruments.
To choose a different clef for the transposed
staff, click Set to Clef to select it, then click the desired clef.
Click OK. You return to the ScoreManager, where your settings have been applied.