/CHANGE_BARS[=character]
       /NOCHANGE_BARS

    Positional qualifier.

    Controls whether DSR generates change bars in the formatted file.
    The default change bar character is the vertical bar (|).  The
    change bars appear 3 spaces to the left of the lines of text that
    you have marked for change bars.

    For information on the .BEGIN BAR and .END BAR commands, enter
    HELP DSR at the DCL prompt.

    You can replace the default change bar character by supplying a
    substitute character for the /CHANGE_BARS[=character] qualifier.
    You must specify the replacement character as either a character
    enclosed in quotation marks (" ")  or as an octal, decimal, or
    hexadecimal value for the desired character.

    The /CHANGE_BARS qualifier without a value uses the default
    change bar character (|). The /NOCHANGE_BARS qualifier overrides
    any change bar commands in the input file and disables the output
    of change bars.