Administration > Workflow
Workflow setting includes Status transitions tab and Field permissions tab.
To edit Status transition permissions, choose a Role (you can select all roles or specific roles) and a Tracker, and then click Edit to modify it. Uncheck “Only display statuses that are used by this tracker” to see all new Issue statuses and be able to add such statuses to the tracker workflow.
You can select more than one Role or a Tracker by using the “+” icon and Ctrl+Click:
If you have selected more Roles or Trackers, options are Yes / No / No change.
Additional status transition permissions can be set for issue authors and assignees (click over row to expand).
In Field permissions tab, you can edit permissions for a Role to manage issue properties fields.
Use Save button to apply any changes.