User to only see one queue

I have rt 4.2.

I want a privileged user can only see one queue. ATM they can see all queues if I turn off privileged user for the user then they see no queues at all.

I’ve created a group, made that user a member of that group. Tried all sorts of settings.

Can someone tell me what is the purpose of Root (Enoch Root) ?

Also what is the meaning of the checkbox for this user " Do anything and everything " under Rights for Administrators tab.

Could this be overriding any other setting I’m trying to make for a group or user?