What is the correct approach for horns?
I'm engraving an old score that uses two horns: D horns in the first and third movements, and G horns in the second movement. I'm not sure what the correct procedure is for setting this up. It seems I cannot change the instrument properties for only a range of measures, and if I add an instrument, I cannot hide the staves in the first and third movements only. Both horns must appear in the same part, and I would like them to play back correctly. Any suggestions?