The file is created automatically by the 'ribbon-model' command in the previous examples. The user adds columns to this file for custom color-coding. Hot spots in the structure should be obvious. The residue may be picked to display information. Dark colors indicate problems.
All files have a simple format.
Data from other programs may be reformatted to generate the lists of spheres, cylinders, or triangles for display. Many utilities support this file format. All figures shown here were converted to PostScript for printing.