never mind - figured it out! That’s great. The only thing I still struggle with is understanding how to know what voice I’m looking at, say, in write mode. (I successfully created a new up-stem voice and changed the playback for it, but how am I supposed to know it’s up-stem voice 2 by looking at it?)
You can see what voice a note is in by selecting it and hitting Return to show the caret. This will show you the voice direction and index with the indicator at the bottom left of the caret. In the forthcoming update there will be a read-out in the status bar when you select a single note, which will be more immediate.