We want to add the "Severity" field to an an issue type that we've been using for a while called "Production Issue" and make it required. When I go to the "Issues->Types" section for the project, I see for each issue type, the workflow, field configuration and screen for the "Production Issue" in the project. What I can't figure out how to do is to add change the workflow, field configuration or screen for this project/issuetype combination.