How do I add or modify the PDF templates for each of the Features?
To add or modify the PDF template for any module, go to the Menu and select Settings. Once here, scroll down to Templates section in Settings.
On the top right, click on the drop down and choose which module you want to edit the template for. Once selected, select a template that you wish to modify and make a copy. Once you make a copy, select the copied version and start making changes. Since you are making a copy, you are able to revert back changes if there are any mistakes done during the edits.