There are two modes you can choose for each Member List you create: List and Hierarchy. In List mode, the structure of the Member List is flat. When the Member List is configured in List Mode, all of its members are at the same level.
When a Member List is configured in Hierarchy Mode, then members can be defined with a Parent-Child relationship. You can define a Parent-Child Hierarchy when the Member List is in Hierarchy mode. To set Hierarchy mode, select Hierarchy for the Mode when you create a new Member List.
Note: By default, the Mode is set to List for best performance.
You can also switch the mode afterward by navigating to the Member List and selecting Configure from the ribbon at the top of the page.
In Hierarchy Mode, select the members you want to build the hierarchy from and utilize the Move buttons in the ribbon to build up the Parent-Child relationship.
In the example below, we have a fully configured Parent-Child Hierarchy.
Note: It’s important to remember that if you switch the Mode back to List the hierarchy structure will disappear.
In the Database, when the Member List is in List Mode, each member’s MemberID and ParentMemberID should be exactly the same. After we create the Parent-Child Hierarchy, each MemberID will point to its Parent’s MemberID.