Hi Richard this happened in a rather bigger score but the attached shows the principle(I am not totally familiar with Ossia staves but I assumed that having picked up the key from the main staff they would behave in the same way)
As you can see a scale of G with a (hamfisted) Ossia a third above shows F# normally in the main staff but as accidentals in the Ossia. And I cannot force a key signature change in the Ossia (only) to try to rectify it.
I can add a normal staff of course! Best wishes Joe
Ossiatest-Default Score Layout.pdf
Description: Adobe PDF document
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