Sets the thickness of contour label characters drawn with the software fonts. Normal thickness is 1.0, double thickness is 2.0, etc. If this keyword is omitted, the value of the system variable !P.Charthick is used.
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.