Yes, the built-in selection mechanism doesn't attempt to use less than
full measures when more than one staff is involved. This is because it
is not clear what objects are in the "same" column. You would have to
cope with notes and rests that straddle beats (and even bars) and grace
notes and non-note objects.
I see. Maybe I wont approach it (trying to make up some script), because it
isn't a particularly essential feature for composing and as is pretty clear, I
am unskilled at making Scheme scripts. Oh well, it was fun to think about.
The Swap Passages stuff leaves it to the
user to think about all that, working with the MIDI on and off times
attached to the objects in the staff. These are assigned even to things
like Rehearsal Marks that don't have on and off times in real life.
Richard
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