I’m working on engraving a rather old piece that has Horn in A flat parts. This doesn’t exist in Dorico either as “Horn in X” or “French Horn in X” so I added it as a new variant of French Horn just to keep things consistent with my house style. However, there’s a problem now in the instrument picker, where if I type “french” … well, you’ll see the problem.
OK, I solved it. What I did to create the instrument initially was to go to Library → Instruments, chose French Horn (E Flat No key sig) and clicked the New Variant from Selection button. I called it French Horn just like all the others and gave it the variant name of “A flat No key sig” thinking that would cause it to show up like all the others (along with doing the necessary things to make it a transposing instrument in A flat and changing it from “French Horn copy” to just “French Horn”). In fact, I’m seeing now that it just shows up in the list of instruments as French Horn; further, looking at the other French Horn instruments, none of them have variant names at all.
My mistake seems to have been to give it a variant name manually. I deleted the botched instrument, recreated it as before but without giving it a variant name. It now works properly. I realize that this is what documentation says will happen if you don’t give a variant name manually, but I do have to wonder if this is the intended result when you do give it one.