READ      -  reads  a  message listed in the directory. Once you are reading a
             message you can move around  to  other messages without having to
             return to the directory.

PREVIOUS  -  backs up the directory  listing to a previous screen if there was
             one.

NEXT      -  lists the next screenful of the directory, if there are still any
             messages which have not been listed.

TOPIC     -  allows you to select a  different  topic  and lists the directory
             for the new topic.
