HPGL Export for SolidWorks - Version 1.0 HPGL Export for SolidWorks is a HPGL plot file export add-in for SolidWorks. This add-in gives SolidWorks the ability to export geometric data from SolidWorks drawings to HPGL Plot (PLT) files. HPGL Export for SolidWorks adds a new file type to the SolidWorks File Save As dialog box. To export a PLT file select Save As from the File menu. Select "HPGL Plot Files (*.plt)" from the"File of type" combo box and select a PLT file to export to.