Starting in release Creo Parametric 8.0, Pro/Diagram is available as a .dgm file viewer. Full use of Pro/Diagram, requires a Pro/Diagram license. Set the enable_obsolete_modes configuration option to yes to access Pro/Diagram in both modes.

In viewer mode, you can open, save, and export files to .dge format for use in Creo Schematics. It is recommended that you export your files to Creo Schematics.