In a manager view, see the records for all people who report to a manager, not only the primaries.
Values: Primary (the default) or Team.
When set to Team, it performs a subquery for the My Team's views to retrieve the accounts, opportunities, and so on, where the reps are anywhere on the team, not just the primary.
Performance is slower but yields more data.
When using Manager List Mode, you must also inactivate the Primary docking rules and activate the Team docking rules: