Convert Email in History Log to PDF

OJS 2.4.8.2

Request:
On an article-level the ‘Email Log’ only allows you to ‘View’ or ‘Delete’ and email. What settings needs to be adapted to add ‘PDF’ as an option to be selected. This allows the user to covert an email into a PDF which can be downloaded, attached and emailed to a user (if needed).

Thanks, Trudie