If you have not saved a topology file during the current TurboGrid session, selecting File > Save > Save Topology from the main menu opens the Save Topology dialog box where you can type a filename for the topology file. For details, see Save Topology As Command.

If you have already saved a topology file during the current TurboGrid session, selecting File > Save > Save Topology from the main menu overwrites that file. To save a topology to a different filename, select File > Save > Save Topology As from the main menu. For details, see Save Topology As Command.