2. Save as ". Dxf "file.
3. Close CAD and find the file in. Dxf format saved before.
4. Double-click to open the file and save it as again.
5. This time, save it as an ordinary dwg file and overwrite the original file.
After saving it twice, the words "educational version" are cancelled in CAD drawings, and the words "educational version" no longer appear when printing.