To post, type f (for follow-up) or F (follow-up with a
copy of the previous post.)
If you type f, trn will ask you if you are making a
related post. If you are not, it will prompt you for a subject.
Trn will ask you if you want to insert a file. Default is
none.
Finally, trn pops up an emacs window. Type your article.
Save and exit emacs.
Trn will ask if you want to Check Spelling, Send, Abort,
Edit, or List your article. Normally, you will (S)end your article,
but you may want to Check the spelling or Edit it for something. Or
just give up and (A)bort.