Paragraph styles can be successively applied and undone in a stack, for example:

nlStyle 'body'    © base style
nlStyle 'indent'  © add indenting
nlStyle 'ind2'    © next level
nlPopStyle        © back up
nlPopStyle        © revert to base

This allows you to overlay a set of new properties easily, and undo the changes without checking exactly which properties need to be backed out.

There is no limit on the depth of the style stack.