5.4 Digital Signature
Run PDF Super Toolkit, click on Digital Signature.
Click on Browse button at the top of the window to choose PDF file from your machine.
Click on Browse button at the middle of the window to select PFX file, enter the password of the PFX file.
Click on Browse button at the bottom of the window to select destination path to save output PDF file.
Click on Process button to save signed document to output PDF file. A message Successfully sign file will be displayed after processing, press Yes to open the output PDF file with system default PDF viewer.