Double ky stave
Rather unconventional! At a guess, and I haven't time to test this:
1)Write it all in bass clef, not worrying about the lower notes being incorrect. Upper notes in Voice 1, lower notes in Voice 2
2)Make the Voice 2 notes cue sized (adjusting the percentage if required)
3)Use the treble clef symbol (Z for the symbols menu) to fake the clefs for the lower notes
This will not play back correctly, of course. If you need playback, you'll have to create a treble staff for the lower notes, input them correctly, then hide that staff. Then select the Voice 2 notes on your initial staff and switch off 'Play on Pass'.
1)Write it all in bass clef, not worrying about the lower notes being incorrect. Upper notes in Voice 1, lower notes in Voice 2
2)Make the Voice 2 notes cue sized (adjusting the percentage if required)
3)Use the treble clef symbol (Z for the symbols menu) to fake the clefs for the lower notes
This will not play back correctly, of course. If you need playback, you'll have to create a treble staff for the lower notes, input them correctly, then hide that staff. Then select the Voice 2 notes on your initial staff and switch off 'Play on Pass'.