Sort by Threads/Subject

Organize articles so they are displayed as a base article followed by each response article. Each response is indented in such a way as to show which article a person was reading when the response was made. This method of sorting uses both the subject and the references header for the sort. The drawback to this method is that it's possible to get an unrelated article in a thread because it has the same subject. This option is only available if Threading was enabled when this group article-list was retrieved. See Configure Article-List.