C_Charsize Keyword
Used With Routines:  CONTOUR,  CONTOURFS,  CONTOUR2,  MAP_CONTOUR
Corresponding System Variable: None.
Sets the size of the characters used to annotate contour labels.
Normally, contour labels are drawn at three-fourths the size used for the axis labels (specified by the Charsize keyword or !P.Charsize system variable). This keyword allows the contour label size to be specified independently. Use of this keyword implies use of the Follow keyword.
 
note
If the CONTOUR2 Fill keyword is used, labeling is disabled. Refer to the description of CONTOUR2 in the PV-WAVE Reference for an example of how to create a filled contour plot with labels.