To Save a Drawing File as a Different File Type
Click
File
menu
Save As.
In the Save Drawing As dialog box, select a location, and enter a file name.
In the Files of Type drop-down list, choose one of the following types and save:
DWG drawing format versions (*.dwg)
a drawing standards file (*.dws)
a drawing template file (*.dwt)
Drawing Interchange Format versions (*.dxf)
Related Concepts
About Saving Drawings