How does the Pin function work?
The pin function allows the user to "pin" a value from a set of values. In doing so the user is selecting a value, not a specific crosswalk. Thus all crosswalk values in the list for the attribute that are equal to the pinned value will also show a pin. As each value is changed via updates the pin will remain until the last pinned value is updated to a different value. At that time the pin will reset and the business rule in place will take over.