1.MAIL> DIR MISC
        #        From                  Date            Subject
        1        MARS::SMITH           11-DEC-1994     Training Information
        2        JUPITER::COLLINS      22-DEC-1994     Ideas
        3        JUPITER::PETERS       24-DEC-1994     Meeting
      MAIL> MARK 2
      MAIL> DIR
        #        From                  Date            Subject
        1        MARS::SMITH           11-DEC-1994     Training Information
      * 2        JUPITER::COLLINS      22-DEC-1994     Ideas
        3        JUPITER::PETERS       24-DEC-1994     Meeting
      In this example, message 2 in folder MISC is marked with an
      asterisk.
    2.MAIL> UNMARK 2
      MAIL> DIR
        #        From                  Date            Subject
        1        MARS::SMITH           11-DEC-1994     Training Information
        2        JUPITER::COLLINS      22-DEC-1994     Ideas
        3        JUPITER::PETERS       24-DEC-1994     Meeting
      In this example, message 2 has been unmarked.