First of all, we need to know where this mark comes from. If you use a CAD drawing with an element block with this tag, it will be followed by this tag wherever you copy and paste it, so we should get the block component we want to use in the drawing, then delete the tag from the drawing and use it later to solve this problem.

When we open a CAD file with educational version watermark, the printed seal of educational version is detected. If you continue, a graphic with the following title will be printed: "Generated by AUTODESK Education Edition products". Do you want to continue? We can only click Yes. If we click No, this CAD file will not be opened.

After opening the stamped CAD Education Edition file, click File-Save As, select DXF file format, and then save it. It's saved. Close this drawing file.

Open the DXF file you just saved, and then restart your previous work. Click File-Save As to save it as a standard CAD file DWG file. Turn it off again.

Open the original CAD file stamped with the seal of CAD education again, and the prompt pictures and words in the first step will no longer pop up.

Let's open the file in CAD XDF format again and go to File-Image Utility-Tools-Repair it in the menu bar. Just repaired the DWG file. Wait until the repair is successful, and then save it repeatedly, completely removing the imprint of the education version.