To view a ticket, its properties, Transactions or Attachments a user needs the Show'Ticket' right to both the ticket and its queue.

Only queues for which the user has this right will be listed on the "Customize Quick search" page, which in turn allows them to be displayed in the "Quick search" section on the "RT at a glance" page.

This right can be granted to users and groups on a global level or on a queue-by-queue basis.

A note on the "Quick Search" section: Edit

I'm adding this note because it was a headache to figure out. Hopefully I can save your aspirin bill

When you grant Show'Ticket and See'Queue permissions to a user or group to see a queue in the "Quick Search" widget, then the user has to log out and log back in to see the queue in the list.

See also: Rights, GlobalRights