For document templates that are automatically attached a customer would like to be able to preview the PDF before it sends. Currently if you use the auto-attach functionality you can't preview the PDF before sending it as it creates the PDF once you click the send button.
You can now click and open/download any attachment before sending the email.
This would also include CRM Library PDFs as well.
I think this would be a great help, sometimes its' easier to 'double check' / spot a mistake on the pdf file