Graphics options control the way graphics output looks.
Some options are valid for most graphics output types, some valid for only one.
Others stay the same until a clear command is issued, and yet others are reset to their defaults by either a clear command or a display command. Thickness of 6 or more will be thicker on the screen. Primarily used for controlling hardcopy output. Shaded contours are drawn without spline fitting, so to insure an exact match when overlaying contour lines and shaded contours of the same field, specify cterp as off. You can still use the 'csmooth' option, which affects both contour lines and shaded contours.