If you already have a drawing that uses educational printed matter, then you should use this method. In any case, the stamp of the drawings that have been used in the education version cannot be removed. The only solution is to save this file as a DWG file of version R 14 (you can use AutoCAD2000 or AutoCAD2002) and delete it.

If yours is not an educational version, as long as there is a print stamp, it means that you have inserted or quoted a file element drawn by the educational version software (even a line will go wrong), so it will continue to expand to any of your files through a simple cad element like a virus (unconsciously).

For files that have been infected with the printing stamp problem of autocad education edition, you can simply clear them in one way! Export your file as an external exchange file of autocad through the file output interface of autocad, and then input it through the input interface, and the file will not be stamped! Through experiments, DXF is the best choice. You can remove the stamp by outputting DXFOUT and then inputting DXFIN! Of course, DXBOUT, DXBIN and so on.

One more thing to remind you: in fact, some questions have ready-made answers on Baidu. All you have to do is put the questions on Baidu's website for search ~ ~ ~