Some advance preparation in the choice of which sub-directories to use for loading and saving files will facilitate this step. The pens are actually just pen numbers that would normally select a particular pen from a carousel in a flat bed plotter. These pen numbers are attached to each object as an attribute and we will use this information in our process to define a color. Select 1 in the Wide field. This defines a single trace per data curve.
Higher numbers define multiple traces, slightly offset, for the curve.
This is useful with a physical pen plotter to achieve thicker lines from a fixed width pen nib. Since we are creating the graph file electronically, we can define line width directly. Multiple traces would only slow things down. To do this, it will be necessary to install a plotter using the Windows printer installation routine. Consult the Microsoft Windows documentation or Help file for detailed instructions on how to do this.