Electronic signatures in pdf will not disappear. In the toolbar of the PDF file to which you want to add personalized signature, open the Signature button in the View drop-down menu. Click the Place Signature option in the signature bar on the right to open the Place Signature dialog box. Choose to draw a signature. You can draw your signature in the signature area with the mouse. When you finish drawing, click Accept. Find the location in the document where you want to place the signature, click Place Signature on the right, move the mouse to the location where you want to place the signature, and then click.