Write:

Enter your message, followed by a dot on a new line, or control-d.
you are then given the prompt :-

Post, edit, reformat, or abandon.

Post,     places your message in the folder.
edit,     puts you into the editor so you can change your message.
reformat, reformats the text so that it all fits compactly in paragraphs.
abandon,  throws away the message and stops write'ing

