| 
            plptex
          ( | x , | 
| y , | |
| dx , | |
| dy , | |
| just , | |
| text ); | 
      Writes text at a specified position and inclination within the
      viewport.  Text is clipped at the viewport boundaries.  The reference
      point of a string lies along a line passing through the string at
      half the height of a capital letter.  The position of the reference
      point along this line is determined by
      
        , the reference point
      is placed at world coordinates just
      
        ( within the viewport.  The
      inclination of the string is specified in terms of differences of
      world coordinates making it easy to write text parallel to a line in
      a graph.
    x,
        y)
      
x
          (PLFLTx coordinate of reference point of string.
y
          (PLFLTy coordinate of reference point of string.
dx
          (PLFLT
            Together with 
              ,
            this specifies the inclination of the string.  The baseline of
            the string is parallel to a line joining
            dy
            
              ( to
            x,
              y)
            
              (.
          x+dx,
              y+dy)
            
dy
          (PLFLT
            Together with 
              ,
            this specifies the inclination of the string.
          dx
            
just
          (PLFLT
            Specifies the position of the string relative to its reference
            point.  If 
              ,
            the reference point is at the left and if
            just=0.
            
              , it is at the
            right of the string.  Other values of
            just=1.
            
               give
            intermediate justifications.
          just
            
text
          (PLCHAR_VECTORA UTF-8 character string to be written out.
      Redacted form: plptex(x, y, dx, dy, just, text)
    
This function is used in example 2-4,10,12-14,20,23,24,26.