single stave key signature change works for some instrument and not for others

• Feb 14, 2022 - 15:55

Hi all,
In the attached score that I'm fixing, having become aware that the key signature of the ENGLISH HORN had to be changed from three to four b-mole to comply with the score, I did not managed to do it when I attempted it, whereas I've managed perfectly when I tried to do the same to the clarinet stave just after it.
Can somebody explain to me why and how I can fix it? Thanks.

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Just select the 1st measure and double click the 5* b key sig in the key sig palette. The horns (in F) are transposing, so will loose one b in the process, just like the Trumpet (in B-flat), it'll loose 2* b

I wonder about your clarinets (in B-flat) though, they should loose 2*b too, but don't, these seem to have lost their transposition settings

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