Master Roll-Up for multiple project sheets

edited 12/09/19 in Smartsheet Basics

I am reviewing the Construction and Facilities Management template set provided by Smartsheet.  I only have a Team account for now.

The template comes with 2 sheets for Projects.  In the Master Roll-Up sheet, you can see the formulas used to pull the info from the 2 Project sheets.  

Question:  Do I have to manually update the formulas in the Master Roll-Up sheet everytime I add or remove a sheet for a project, or should the Master Roll-Up sheet update its formulas automatically?

My primary interest in this template is to see how to roll-up multiple project sheets.  If we have 50 active projects, each with its own sheet, I need the master roll-up capability... but I don't want to edit the formulas in the master roll-up each time a project sheet is added or archived.