The .VARIABLE command allows you to specify a character that
    corresponds to the name you have given the commands and text in
    an .IF (or .IFNOT) block. This identifying character is placed
    in the left margin when you process your file with the /DEBUG or
    /DEBUG=CONDITIONALS command line qualifier.

    Format

      .VARIABLE  name [t ,f]

    Abreviated format

      .VR name  [t ,f]