Fluidly promote and demote _Styles_?

Hi. New to OO. Is there a suggested process for, after inserting a level to what will become a template, re-assigning all the Level Styles “down one” so that the already-developed “Row➞Level Style” relationship is retained? When I design outlines, I want the Level Style to stay with the content I will be putting in that Level, even while I shift the organization of the levels within the outline. (I know how Named Styles work — that’s not what I’m after. I want the auto-formating by level of Level Styles — but not while I am writing templates.)