I imported a midi file having three staffs per system.

When I try to select a staff for editing, all three staffs are selected.

How can I separate the staffs to edit them independently?

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As a work-around, I can select the staffs independently by double-clicking in the Staff tool.

However, when I try to transpose the selected staff in Utilities, the transposed notes are added but the original notes are not deleted.

How can I make the transposition work?

Thanks,

Vern