Thick Keyword
Used With Routines:  AXIS, BAR3D,  BOXPLOT,  CONTOUR,  CONTOURFS,  CONTOUR2,  OPLOT, PLOT, SHADE_SURF,  SHADE_SURF_IRR,  SURFACE
Corresponding System Variable:  !P.Thick
Controls the thickness of the lines connecting points. A thickness of 1.0 is normal, 2.0 is double-wide, etc.