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TITLES

 Following the NAMELIST are three title lines, each up to 500 characters
 long.

 1) Graph title
 2) X-axis title
 3) Y-axis title.

 The last non-blank character  in each title will  be used to  determine
 the title length, and the resulting string will then be centered on the
 plot.  Lower-case letters may be used in titles, if they are available.
 Otherwise, they can be  obtained by using  the case switch  characters,
 "<" and ">" (left  and right angle  brackets), which convert  following
 letters to  upper  and  lower  case  respectively.   A  doubled  switch
 character suppresses its interpretation as a case switch, and causes it
 to be collapsed to a single character which is displayed in the plotted
 string.  Multiple line titles  can be obtained  by separating the  line
 strings by the  two-character sequence $N  or $n.  Thus,  if the  graph
 title line supplied is

 Label 1$NLabel 2$NLabel 3

 then the graph title will be three centered lines:

                              Label 1
                              Label 2
                              Label 3

 When multiple-line titles are requested, it will usually e necessary to
 reduce the  horizontal and  vertical  extent of  the plot  through  the
 options HSCALE and  VSCALE in  order to make  the margins  sufficiently
 large for the title text.