I have a site that allows users to create and share lists. Each page represents a different list. Next, I add a secondary list that represents a shared or global list on all user pages. Although this secondary list is global, I want the user to have the ability to create a customized variant that is not global.
Basically, I maintain a unique global list that can be edited on any page, but you can disable the global aspect page by page.
How could you put this?
This is what I have: