Giving this a little more thought… I just realized one might use a UDL (User Defined Language) and just have parentheses to do the folding for you. Menu/Language/User Defined Language. It’s fairly easy to use, won’t do anything; but, a great way to learn a Np++ feature! :-)
It might make an ugly print; but, a quick search and replace would fix that when done, or temporarily saved as another file.