P Go to the previous newsgroup with unread news. Quit this group. On the article selection level, trn displays unread articles in thread sequence, reading each article and its replies before going on to another topic. The normal article selection prompt comes at the END of the article . N Go to the next article.
P Go to the previous article.
Refresh the screen. Scan forward for article containing pattern in the subject. Scan forward for article containing pattern in the header. Scan read articles also. Mark the current article and all its replies as read.