- Choose the Key & Rhythm tool from the main section.
- Choose the Key Signature tool from the red sub-section.
- Click the bar where you want to change the key signature.
- Select one of the tunings defined in the current score and click Change. The key signature defined in the tuning will be attached to the bar.
To change the tuning or add new types of tuning to the current score, open the Score menu and select Tuning.