One thing that's always driven me crazy about your "mixer" is that the "channels" go "high to low", left to right. My pianist brain wants the higher instruments on the RIGHT. Imagine you have an SA...
Currently, if you have hidden staves in a Finale file, and export that file a Music XML, and read it into MuseScore, MuseScore shows the hidden staves. Either Music XML doesn't support hidden stav...
Can't believe you don't have this ability (if you do, please let me know how to do it): I want to be able to grab a measure-line handle, drag it left or right, and have the music, in the same sys...