I have created a custom field on ‘Case Fields’ and named it as ‘epic’ (1). When I went back to the Test Case view and tried to find that custom field ‘epic’, it does not exist there (2). That said custom ‘epic’ field is also not appearing when creating / editing a test case (3
Did you add the field to a Project (or all Projects) yet? In the screen shots the Projects portion is empty (not added to any project).