Although it is possible to hid an instruments staff through "Style > Edit Style > Score and add a check mark next to "Hide Empty Staves"."
I ask if it is possible to hide only one staff line until it is used for example a third piano bass stave which isn't used until the end in a concerto styled orchestration. However keeping even instruments not being used all the time still visible on the conductors score.
I hope this makes sense. Thanks.