The .ENABLE UNDERLINING and .DISABLE UNDERLINING commands enable
    and disable the underline function. You can perform underlining
    only if recognition of the Underline flag (&) is turned on and
    the underline function is enabled.

    Formats

      .ENABLE UNDERLINING

      .DISABLE UNDERLINING

    Abreviated formats

      .EUN

      .DUL

1  –  Default

    Operation of the underline function is initially enabled (.ENABLE
    UNDERLINING) and recognition of the Underline flag (&) is turned
    on (.FLAGS UNDERLINE).