1 CHARACTER
          [POSTER\]CHARACTER value

     Sets the character size for POSTER and GreG in  PLOT_PAGE  units.
The  command  SET CHARACTER of GreG should not be used as it would set
the size for GreG only, and would result in  bad  results  for  POSTER
commands.

     Beware that the character size  is  not  simply  related  to  the
lowercase or uppercase character size.  Do try...
1 DOWN
          [POSTER\]DOWN value

     Moves down the reference point (in relative PLOT_PAGE units).
1 INDENT
          [POSTER\]INDENT value

     Sets the indentation  value  (default  indentation  is  0).   The
reference  abscissa  for text and tables is the sum of the abscissa of
the reference point and of the indentation value.

     Thus the INDENT command offers a simple way to  shift  some  text
units  left  or  right  with  minimal  editing  of  the global command
procedure.
1 Language
                    POSTER\ Language Summary
CHARACTER size           : Sets the character size
SPACING value            : Sets the interval between text lines
RELOCATE [x y]           : Relocates the reference point 
INDENT value             : Sets the indentation 
SKIP value               : Moves down the reference point 
UP|DOWN|LEFT|RIGHT value : Moves the reference point to specified
direction
TEXT [text] [options]    : Plots text
TABLE /FILE text_file    : Plots a table

     This language is still experimental.  It provides few  additional
commands  to the GreG environment in order to facilitate the making of
posters or transparencies.  Users are advised to send any comments  or
suggestions to P.  Valiron.

     The compulsory GreG commands to be used together with POSTER are

     1.  SET PLOT_PAGE

     2.  SET FONT SIMPLEX|DUPLEX

     3.  DEVICE

     4.  HARDCOPY

Any other GreG command can be used also, especially DRAW  for  further
annotations.

     The philosophy of POSTER is slighty different of GreG's  one,  so
you need to pay special attention to the following :

     1.  The character size should be set by the command CHARACTER  in
         POSTER  and  NOT  by  the SET CHARACTER command of GreG.  The
         resulting character size is set for both GreG and POSTER.

     2.  POSTER  works  in  PLOT_PAGE  coordinates.   Point  (0,0)  is
         located to the down left corner of the PLOT_PAGE.

     3.  POSTER keeps its own variables to remember where the pen  is.
         When  you  move  the reference point in POSTER, you also move
         accordingly GreG's pen.  But the reverse is  not  true.   You
         can   annotate  your  poster  with  GreG's  commands  without
         disturbing the  reference  point  in  POSTER.   Use  RELOCATE
         without  arguments  to  copy  the  GreG's  pen  location into
         POSTER.

1 LEFT
          [POSTER\]LEFT value

     Moves left the reference point (in relative PLOT_PAGE units).
1 RELOCATE
          [POSTER\]RELOCATE [x y]

     Relocates the reference point to (x,y) in PLOT_PAGE units.  If  x
and  y are not specified, relocates the reference point to the current
location of GreG's pen.
1 RIGHT
          [POSTER\]RIGHT value

     Moves right the reference point (in relative PLOT_PAGE units).
1 SKIP
          [POSTER\]SKIP value

     Synomyn for DOWN.
1 SPACING
          [POSTER\]SPACING value

     Sets  the  interval  between  text  lines  in  PLOT_PAGE   units.
Whenever  a  text  line  is  plotted by POSTER, the reference point is
moved down of the spacing value.
1 TABLE
          [POSTER\]TABLE /FILE table_file

     Plots a table from an external file.

     The table file is expected to contain  a  header  to  define  the
appearance of the table :

     1.  First header line.  Number of columns (free format)

     2.  Other header lines.  For each column, specify in free  format
         the  offset  for  the  reference  point of the column and the
         associated   centering   option.    Use    option    7    for
         right-justified,  8  for  centered  and  9 for left-justified
         column.

     3.  Text of the table, one text line per table line.   Fist  word
         for fist column, second word for second column, etc...


     The underscore character is not plotted and may be used  to  link
several words into a single "column word".  Ex:
    4
    0 9   10 8    20 7
    Column_one aa 1
    Column_two aaaaaaaaaa 10000
will appear as :
    Column one         aa            1
    Column two     aaaaaaaaaa    10000

     Centering option 0 can be used for numeric columns.  It uses  the
decimal  point  as  reference  point.  Integers are located as if they
were followed by a point.
1 TEXT
          [POSTER\]TEXT "text string" [ /JUSTIFIED [/SEPAR value] ]
          [POSTER\]TEXT /FILE text_file [ /JUSTIFIED [/SEPAR value] ]

     Plots a single text line or a whole text file.  First line  comes
in  with  centering option 9 respective to the current reference point
and indentation (text above and right).  Further lines are moved  down
of  SPACING.   The proportional font spacing of GreG results in a nice
output.  However it does't preserves right justification.

     The option /JUSTIFIED adjusts the length of the blanks so that  a
text   initially   justified  for  equally  sized  characters  remains
justified with the proportional fonts of  GreG.   The  resulting  text
width  is  the  product  of  the  number  of  characters  by a typical
character separation (0.57 times the character size).  This separation
guarantees that any text can be plotted.  It produces too large blanks
for texts in lowercase.

     The option /SEPAR allows some control  on  the  blanks  when  the
option   /JUSTIFIED  is  set.   It  overrides  the  default  character
separation (see above) by a user-defined value.  As a rule  of  thumb,
try 90% of the default.
1 UP
          [POSTER\]UP value

     Moves up the reference point (in relative PLOT_PAGE units).