Use variables to include details like assignee or priority in the subject line of a notification message.
The subject line of notifications triggered by actions performed in Tracker can be customized to include detail from the record that was modified. For example, the image above shows the subject line of a message that will be sent when a record is re-assigned.
The Admin Help Guide contains a list of variables that can be used in notification rules. The notes below the table explain how to call out other fields not listed in the table (e.g. a pulldown other than status or assignee).
For detailed steps on modifying rules, review the Notification Rules section.