Add Direct Reports to "My Managed Resources"

Have a look as this article and see if this is what you are after.

Thank you for replying.
No, that's not what I'm looking for.
Currently, if I set someone as the secondary owner of a user, they can see that user under "My Managed Resources."
I want to set a manager for a user so that the manager can also see the user under "My Managed Resources," not just the secondary owner.