Attaching a PDF

I have Bitnami/SuiteCRM (local) and like to attach a PDF document to a certain accounts/contacts.

I tried with Account/Module Documents, but upon clicking the PDF link it is not popping up.

If I click the the C\pdf files\xxxx.pdf then i get it (outside) SuiteCRM with My Nitro/PDF reader.

How to do it ?

Maybe first you want to read this:

You don’t have to use Documents if you don’t need to keep several revisions.