Settings for the various options are essentially governed by your specific needs.

You should pay particular attention to the drawing scale. There are various ways for defining the size of a CGM file. For example, you can base the drawing on metric dimensions. It is also possible, however, to create a CGM file using an independent system of units (abstract scaling). This allows the reading program to scale the drawing to the size it considers most appropriate. In this case, the drawing will be matched to the actual sheet size used for the Arbortext IsoDraw drawing.