The "File/Open..." menu will load an existing SIMGRAPHICS II library file and show its objects in the list window. Use the "File/Save" or "File/Save As" option to save all objects shown in the list window. (Including objects being edited.) Use the "Options/Binary file" option to toggle between saving the file in ASCII or binary format.
See Also
Adding an object to the library
Adding an object from another library
Removing an object from library
Changing the name of an object
Making a duplicate of an object