In Mus2, key signatures and tunings are handled as a single en
To add an accidental to the key signature, select the accidental from the upper box on the Key Signature tab and click on the preview staff below. To remove an accidental, choose the eraser tool and click the accidental.
To use the same tuning with different key signatures, use the Duplicate button to make copies of the tuning.
To apply tunings and key signatures to staves, see Key Signature.