Please refer to the following:
1. Open a CAD document with an education stamp, open the "File" option in the upper left corner, and find "Save As" in the open list:
2. In the "Save" dialog box that pops up, change the saved document format to "". Dxf ",and then close the drawing:
3. Find the saved document. DXF format, open it and click "File" to save.
4. Find the document saved as "". Open it again and click Print Preview, as shown below, without the words "Autodesk customized product made by Autodesk customized product":