In Writer there are two checkboxes for each entry. They are labeled [M] and [T].

Apparently, [M] is for "do it when user chooses Format → AutoCorrect → Apply from menu".

BUT it does work only for paragraphs with Default style. So I wasted last two hours trying to figure it out, until I happened to read this old OOo forum topic: <http://forum.openoffice.org/en/forum/viewtopic.php?f=7&t=11777&p=55154>

At least, please state clearly in documentation that autocorrection elements with [m] checked will work only for Default style. I have read help files and LibreOffice Writer guide chapter about AutoCorrection. Neither has mentioned that.

As larger issue: why does it work only on Default style, anyway?
Choosing Format → AutoCorrect → Apply from menu will change style from Default to Text body. What is the point of having menu option that will work only once for paragraph (which may be modified later)?