Defaults

   o  If you do not enter either .SUBTITLE or .NO SUBTITLE, you get
      .NO SUBTITLE.

   o  If you enter the .SUBTITLE command without specifying subtitle
      text for it, you will get the effects of .AUTOSUBTITLE
      (provided you have not entered .NO AUTOSUBTITLE).

   o  If .AUTOSUBTITLE is in effect and if the text picked up from
      an applicable .HEADER LEVEL command is wider than the margins
      in effect when the subtitle is displayed, the subtitle is
      truncated and an ellipsis (...) is appended to the end of it.