To create a new graph, press 2. Copy the watermark map to the new map, and confirm the education version when pasting.

3.ctrl+s saves the newly created drawing in dxf format in 2007.

4. Close the pop-up new drawing prompt box, and select No.

5. Open the dxf file saved just now again, which is a watermark-free dxf (please select dxf format in the folder when opening, otherwise you will be surprised that dxf file has not been saved just now, only dwg file, and you can find the saved watermark-free new file by selecting dxf as the file type)?

Save the file in dwg format again, and it's done. In fact, the watermark has been removed from dxf in the last step, hoping to be adopted.