Template Keywords
Drawing - pen
The /pen/ keyword sets the colour used by the /line/, /rectangle/, /grid/, and /hgraph/ keywords.
/pen/,<pen style>
The pen style must be one of the following:
black
white
null
solid
If the pen style is solid, the /pen/ keyword should be preceded by the /colour/ keyword to specify the colour used.
Examples
This example sets the pen to black
/pen/,black
This example sets the pen to yellow
/colour/,255,255,0
/pen/,solid