STEP Drawing Import and Export
Install the STEP Drawing Import and Export Extension for compatability with *.stp files. This functionality allows you to share files created with many other 3D drawing software that can use the .stp file type.
This Extension will add options to the "Import File ..." and "Export Drawing ..." dialogs accessed from the File menu in CET Designer. When importing a file, you will see compatible *.stp files available to load in the "Open" dialog. To export, choose the .stp option from the "Save as type" drop-down menu at the bottom of the "Save As" dialog.