Paste Line

Here's a question for all you Musescore gurus. I would like to paste a line into another line while keeping what is in the original line. What I mean is, for example, say I have a four part choir staff, each part (soprano, alto, etc.) on a different line. If i want to take that staff and consolidate it into a closed choir score, I would need to copy and paste both the soprano and alto onto the same line, the same for the tenor and bass. Is it possible to do this?