The materials we need to prepare are: computer, Adobe Acrobat.

1. First, we use Acrobat to create a one-page PDF. Right-click the thumbnail view of the first page to open "From File" in the inserted page. 2. Then, we select the PDF file whose signature is to be deleted in the pop-up dialog box. After that, we select "After" in the pop-up window, and then click "OK". 3. Then we click on the first page, right-click and select "Delete Page".