A few suggestions for viewer mode - constant speed viewhead, hide x and () notes, global preferences

I've been using tonelib jam for a few weeks, and I really enjoy it! Great piece of software, especially for rehearsals!

I'd just like to point a few suggestions that I think would make the product even better.

1 - In viewer mode, have the option to get a playhead thats moves at a constant speed through a song, instead of doing so step by step, stopping on every single note. It would make following a song a lot easier!

2- In viewer mode, have the option to hide x and () notes, for reading clarity purposes while playing. The music sheet would be less cluttered.

3- Get a possibility to globally preselect a specific type of track (bass, or lead, or any other instrument) on the opening of any song. Instead of individually choosing the track you want to play on when you open every single song.

4- Get a possibility to set a global fixed volume level for backing vocals for all songs. Thus, one could do without having to modify them one by one.

All in all, simple enough improvements I think for an already amazing product! Keep up the great work!