.RIGHT_MARGIN

   The .RIGHT MARGIN command sets the right margin to the position
   that you specify. This is the position to which a line of text
   normally extends. If .JUSTIFY is in effect, the .RIGHT MARGIN
   value is the position against which text is justified. If .NO
   JUSTIFY is in effect, the .RIGHT MARGIN value specifies the
   maximum number of characters on any text line. (Compare with
   .PAGE SIZE, which sets the page width for running heads.)

   Format

     .RIGHT MARGIN  [[+/-]n]

   Abreviated format

     .RM  [[+/-]n]
 

Additional information available:

Parameters      Defaults