Starting new movements in an individual part

I'm transcribing a horribly printed single-instrument part of a multi-movement piece; the goal is to have something I can actually read and play when desired. I've got a single staff going with multiple voices (cues), and I'd like to include multiple movements in the same document. Is there a graceful way to do this?

So far I've just used MuseScore to produce simple handouts for my students. This is a significantly more sophisticated task. I'm OK at basic entry, but I'm not completely conversant in all of the many, any different settings dialogs.

Also, this part is tacet in 2 movements. Got a "best way" to notate this?

Thanks much for helping this rookie.