ClarisDraw 1.0 ships with a CGM filter. CGM is a file format commonly used on Windows machines. If you need to open a CGM file, be aware that ClarisDraw will not be able to open the file based solely on the file's three-digit extension - you will need to edit the file's file type code manually using Norton Utilities, ResEdit, or some other utility. The file type for a CGM file should be "CGMF".