The .AUTOSUBTITLE command causes DSR to use .HEADER LEVEL titles
    for running-head subtitles. Subtitles therefore can change
    according to the section title that applies to a given page.
    The .NO AUTOSUBTITLE command cancels the .AUTOSUBTITLE function.
    (See .HEADERS ON, .SUBTITLE, and .HEADER LEVEL.)

    Formats

      .AUTOSUBTITLE  [[+/-]n]

      .NO AUTOSUBTITLE

    Abreviated formats

      .AST  [[+/-]n]

      .NAST

1  –  Parameters

 n

    The highest numbered header level whose title will be used as a
    subtitle. For example, if you enter .AUTOSUBTITLE 2, the titles
    of header levels 1 and 2 appear as running-head subtitles. Header
    levels 3, 4, 5, and 6 do not appear as running-head subtitles.

 +n

    Increases the current highest numbered header level by n.

 -n

    Decreases the current highest numbered header level by n.

2  –  Defaults

    o  If you do not enter .AUTOSUBTITLE or .NO AUTOSUBTITLE, the
       default is .AUTOSUBTITLE 1.

    o  If you enter .AUTOSUBTITLE with no value, the default is the
       value you specified with a previous .AUTOSUBTITLE command. If
       no .AUTOSUBTITLE command was previously entered, the default
       value is 1.