Watch

A user with the Watch right can add or remove himself as requestor or Cc watcher on tickets.

This right can be granted to users in a global context, or on a queue-by-queue basis. In a global context Watch right also gives facility to modify queue watchers.

The ModifyTicket or ModifyQueueWatchers right allows a user to add or remove himself as well, next to the other possibilities these rights give to a user.