CONTOUR:LEGEND

character_size

 The size of the legend characters is LEGSIZ.  The value of LEGSIZ, or
 %LEGSIZ, can be changed with the SET command. The default value of
 %LEGSIZ is 1.6

axis_relocation

 The legend requires the right end of the x-axis to be set to 75% of
 the window, that is, %XUAXIS is set to 75.  The value of %XUAXIS can
 be changed with the SET command.

 By default, %XUAXIS is reset to its former value after the CONTOUR
 command is finished. If the \NORESET qualifier is used, the axis location
 is not reset.