Could you add horn in F without key signature to instrument list? There are other horn transpositions where you can choose not to have key signature, but not for horn in F.
I know I could add atonal key to Horn parts only. but I think it would be better to have instrument where you would’t need to do tricks like that.
It would be nice to have this option when you add an ensemble of four horns. Better still, it would be nice to have the have a multiplier, i.e. the option to add multiple instances of the same instrument/player, so you can add four key-less horns in one go (and likewise for other instruments, of course).