Selecting symbols on different staves (lasso selection)
To select notes on different staves, use any of the contiguous or non-contiguous methods described previously (like command-clicking on symbols), or drag a selection rectangle around them.
See Also:
Selecting individual notation symbols
Selecting multiple symbols
Selecting contiguous symbols
Selecting non-contiguous symbols
Selecting all symbols in a measure
Selecting all symbols on an entire staff line
Selecting all symbols in a track
Changing the pitch of notes
Copying notes by option-dragging
Moving symbols other than notes
Copying symbols other than notes
Editing symbols in the score