The .DISPLAY ELEMENTS command allows you to specify the form that
    sequential numbering or lettering of items in a list will take.
    This command does not change any values; it affects only the way
    the values are displayed. (See also .LIST, .END LIST, and .NUMBER
    LIST.)

    Format

      .DISPLAY ELEMENTS  ["x",] y [,"z"] (or ['x',] y [,'z'])

    Abreviated format

      .DLE  ["x",] y [,"z"] (or ['x',] y [,'z'])