Add a new key signature
You can add a new key signature by going to the “Measure” toolbar, clicking on the Key Signature tool and choosing the new key. If there is no range selection, the new key signature will be applied until the next key or the end of the score. If you only want to change the key on specific measures, make a range selection of the measures before choosing the new key signature.
Change an existing key signature
You can change an existing key signature by clicking on the key and choosing the new key, or using the tool available in the “Measure” toolbar.
When you create a score, a “ghost” C major key is displayed, on which you can click to change the key of the score. This score is only displayed when editing the score.