I have used Acrobat Reader for many, many years. My employer supplies smart cards with digital certificates for the purpose of accessing sites and signing documents. My card works fine with all sites; I am able to log in to whatever site I have need. My employer supplies pre-filled forms to fill out and digitally sign. I can fill in the forms with no problem. My problem is that I just updated to Reader DC from Reader Xi. In XI, I have no issue adding y digital signature certificate to any signature block I came across from my employer. In Reader DC, I cannot add my digital signature. No dialog box even comes up when I click on a "sign" box. The solution is likely very simple, but at the moment, I am at a loss.