Hello, regarding the inner voice in Chopin’s C major prelude, I recall seeing a way to notate this using nested tuplets, but it is not turning up in searches. I’d be really grateful if someone could please reply with a link to that thread.
In the meantime, the solution is to create a 6:4s tuplet, advance the carat 1s, create a 3:4s nested tuplet, enter the dotted 8th note, advance the carat 1s and enter the final 16th note. The notes will now align with the other voice.