. Certificate a given PDF with given certificate:Input a PDF, a Certificate and the respective password. Use "useDefaultPosition" and the input coordinates to control the location of the certificate on the PDF. If "useDefaultPosition" is true, the coordinates will be ignored.
. Validate a given certificate versus given password:Use if you only want to Validate a Certificate.
. Use an Image of a Signature and append it on the PDF:Use XPos, YPos, ImgWidth and ImgHeight to set the given image position and size.Use the PageNumber to set the page where to insert the Signature.
Added DEMO app.