Positional qualifier.

    Directs DSR to change the order in which flagged text is
    underlined on an output device. If you use this qualifier, the
    printer first prints the characters to be underlined, then issues
    a carriage return without a line feed, and finally prints the
    underscores to underline the flagged text. If you view your file
    on the terminal, the flagged text is overwritten by the underline
    character.