1, PDF document cannot be edited after it is signed. At this time, we need to find a solution. Just open a page of editable PDF document.
2. Click "Tools" and "Organize Page" in turn, and click the lower triangle symbol next to "Insert".
3. Select From File, and then select the signed non-editable document to open.
4. Under the "Insert Page" option, click "OK" after the last page of position: and page:.
5. An unsigned PDF file will be generated, and finally the redundant home page will be deleted.