Defining issue types and sub-types allows you to specify information on project issues.
Project administrators can control the issue types available for selection, and add custom issue types or sub-types to make filtering issues more efficient. Members select sub-types while creating issues.
Custom attributes must be assigned to issue types or sub-types to appear in issues.
Custom issue types can't be removed. They can only be set to Inactive from the More menu .
Only project administrators can create issue types or sub-types.
Click the arrow next to an Issue Type to expand the sub-types drop-down menu. You can add sub-types or edit/activate sub-types from the More menu .