The template files can be found within the
Override templates in Theme
You can customize DK PDF Generator template files in an upgrade safe way through overrides. Simply copy the desired templates into a directory within your theme named
/dkpdfg, keeping the same file structure.
Copy plugins/dk-pdf-generator/templates/dkpdfg-index.php to themes/your-theme/dkpdfg/dkpdfg-index.php
Override templates in Child Theme
DK PDF Generator allows override templates in Child Themes too.
Copy plugins/dk-pdf-generator/templates/dkpdfg-index.php to themes/your-child-theme/dkpdfg/dkpdfg-index.php