Swap two parts on page

Hi all, long time user, first time poster.

I've been transcribing Dittersdorf's Sinfonia Concertante for Contrabass and Viola, using a printout of the full ensemble score. I've been trying to make a part that just has the Bass parts on it for an audition piece. At first, I was going to use voices, but it started to look ugly, so after writing all of the ensemble Cello/Bass part out, I made a second staff for the Bass Soloist.

This is such a minor thing, but I've completed movement 1 and before moving on, wanted to know if there's a way to just swap the positions of the two staves without losing anything, since adding the second staff put the soloist below the ensemble.