To add a manager to a team, click on Teams in the left navigation menu. On the Teams page, locate the team to which you wish to add the manager and click on the name of the team.
Next, click on the Team Members tab and locate the team member you wish to add to the team (you may need to select Show All Team Members and/or use the Search box to find the individual, particularly if the manager is not currently listed as a member of the team). Click the empty circle in the Team Manager column. This immediately makes the individual a manager of the team.
A manager can be unassigned from a team by clicking the same circle (this time containing a green check mark instead of being empty to represent that the individual has been assigned).
Note: You can have multiple Managers on a Team. Users with the Manager Security Role can see and modify the Teams they manage.