[otrs] User Levels

Hi, I was wondering if there is a way to define user levels. For example, Agent > Queue Manager Should see all the tickets assigned only to his/her queue including tickets assigned to other agents within that queue, but should not see tickets from other queues Agent > Normal Should not have option to change configurations (should not see Admin tab) Customer > Company Admin Should see all the tickets from his company created by all the customers\ Regular customer users should see only their own tickets GoodWills Parag Bhalerao