The  set title command produces a plot title that is centered at the
 top of the plot. Using the optional x,y screen offsets, the title
 can be placed anywhere on the plot.  set title with no parameters
 clears the title.

 Syntax:
          set title {""} {}{,}
          show title

 Specifying constants  or  as optional offsets for the
 title will move the title  or  character screen
 coordinates. Note these are screen coordinates and not plot
 coordinates. For example,

          set title ,-1

 will change only the y offset of the title, moving the title down by
 roughly the height of one character.

 (The EEPIC, Imagen, LaTeX, and TPIC drivers allow \\ in a string to specify
 a newline.)