I have been trying to allocate different solo instruments to choruses but have not found the way.

What I want to do is have the melody on the first chorus, followed by maybe a trumpet soloing for the next 2 choruses, then sax, then leave 4 choruses free for me, and then trade 4s for a chorus or two and finish with the melody. Just like you would expect at jazz jam or gig.

I don't seem to be able to find out how to do it. is there a tutorial video?

Thanks in advance.