Transpose

Hallo everybody,

I'm not able to make a score play transposed (I'm not even shure this is possible on MuseScore).

For example, I write on the score: A, B, C, and MuseScore plays it B, C#, D (i.e. one tone higher).

I know that when i choose the instrument, if i choose a traditional transposing instrument such as the clarinet, this is automatic. But I need to write a score for guitar with capo, which of course is not a traditional transposing instrument.

Can you help me?