15.64.18.27  ORIENTATION    - This  is  an  integer  value  from  0  to  3
specifying the orientation of the plot.   It  rotates  all  plots  on  all
opened devices, unlike the LANDSCAPE and PORTRAIT options.
    ***  0 Normal orientation
    ***  1 Rotated 90 degrees clockwise.  This is the same as sideways.  X
         goes from top to bottom, while Y points to the right.
    ***  2 Rotated 180 degrees or Upside down
    ***  3 Rotated 270 degrees clockwise, appropriate for TeX