Library /sys$common/syshlp/lse$menu.hlb SET_BUFFER_RIGHT_MARGIN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Syntax:  SET BUFFER RIGHT MARGIN column

  Sets the right margin for the current buffer.

  LSE sets the buffer's right margin to column 80, by default, or to
  the column number you specify.  If the SET BUFFER WRAP command is on,
  this command affects the FILL and ENTER SPACE commands.