Is there any way to delay an instrument change in the score? Or at least delay the key signature change that comes with it? It would be really nice if one of the layout options for instrument changes could allow this to not show up until the new instrument. In the parts it may be important to give the player plenty of warning, but in the score it’s creating an awkward key change at the end of a system for a single instrument that isn’t relevant.
See this thread. Let us know if that doesn’t address your concern. There are many other discussions of this issue if you search.