I created some scores with key signatures for the horns. After consulting with some players, I woud like to change the horn parts to no key signatures (but, of course, retaining all the accidentals). To be clear, the other parts in the score should keep their original key signatures.
Is there a way to do this without creating four new horn parts and deleting the original ones?
It may not have occurred to him that there were “instruments” already set up to do that.
BTW, the other option is to edit the instrument definition for the horn you’re already using and just uncheck “Uses key signatures”. That’s how the “F No key sig” horn is set up by default.
There are a couple of things you could do. In Setup mode, you can drag the players around until the musical material is in the correct order, regardless of the player/instrument number, and then do Setup > Renumber Instruments.
Or, instead of changing the instrument held by each player, you can click on the 3-dot menu next to one of the instruments and choose Edit Instrument Definition. In the window that opens, scroll down to the Transposition section and untick “Uses key signature”. All 4 horns are using the same instrument definition, so changing the definition will change the display properties for all 4 at once, without changing their order.
I would make sure the chosen score order in Setup is set to NONE (That should prevent Dorico from reordering and renumbering). Then just change each Horn instrument to no sig.
(I’ve not tried it, but that’s what I would do)