Strings with extra staves for division

Hi all, I’d like to create a score, where all the strings have a second stave available for complicated divisions.

It should be in such a way, that it shows in the full score only when needed.

How can I set this up?

Thanks! Stefan

At any point you can right-click>staff>change divisi… The divisi dialog will allow to specify how many divisions to make (and whether they are sections or sections and soloists).
When the divisi ends use right-click>staff>restore unison