Defaults

   If you do not specify a value for any given n, DSR supplies the
   following default values:

   n1=3  Run-in titles for header levels 3 to 6.
   n2=1  Titles in all uppercase for header level 1 only.
   n3=6  Titles with only the first letter of every word in
         uppercase for header level 2 to header level 6.
   n4=7  A sequence of numbers (or letters) preceding the section
         title. (See .DISPLAY LEVELS.)
   n5=7  Titles printed starting at the left margin (flush left),
         not centered.
   n6=3  Three blank lines before each header.
   n7=1  One blank line after each header.
   n8=9  Seven more than the test-page value of the most recent
         .PARAGRAPH or .SET PARAGRAPH command you have entered. If
         you have not specified such a value, you get 7 plus the
         .PARAGRAPH default of 2. (See the description of n8 for
         note on .SPACING adjustment.)
   n9=2  Two spaces between the section number of the header and the
         header itself (section title).