The .FLAGS UNDERLINE and .NO FLAGS UNDERLINE commands turn on and
    turn off recognition of the Underline flag character (&).

    Formats

      .FLAGS UNDERLINE  [k]

      .NO FLAGS UNDERLINE

    Abreviated formats

      .FL UNDERLINE  [k]

      .NFL UNDERLINE

1  –  Parameter

 k

    Specifies a character to replace the current flag character.

2  –  Default

    .FLAGS UNDERLINE - Recognition of the Underline flag character
    (&) is turned on.