I am writing a drum-kit sheet and I would like to add two notes on the same beat with opposite stems like this
And so far, I haven't found how to do it, I only get this kind of stuff :
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Yes, you can use the multi-voice feature.
On each track, you can use up to 4 independent voices : the notes can have different duration and independent stem direction.
Each number represent a voice (when selected, the notes on that voice are in black, the others in gray) and the last button displays all voices in black.
When you edit / enter notes, it is applied to the current selected voice.