I open the score editor for one part only.
when using select-all in the score editor a lot of events not in view also get selected: tempo track events, bar offset, markers, even sysex messages in other parts.
when then editing the notes (e.g. moving them all up 1 beat) all these other events also move. So you’re working in the score editor, but you may be screwing up your tempo track or other stuff.
that’s not a feature I would say…. ideally I would like only the notes to get edited, if necessary I can edit the rest seperatly.
Michel