TCPDF generates PDF, but how can I remove the footer and header?

Hi everyone, 

I'm new to Drupal, using version 7, and generating a Certificate node into a PDF (TCPDF). When generating the PDF, three things are added automatically(marked in the image below):

1. A header with the node's title and site URL
2. The node's title in a second location
3. A footer with the page number

My question is: is there a way I can remove these three? I couldn't find any options to do so in the settings. I did find a few external forums which mentioned editing the print_pdf.pages.inc file, but the issues were published 3-8 years ago and I wasn't able to locate the same functions they suggested editing.

Sorry for the newb question. I hope this isn't a duplicate post, I wasn't able to find any with the same issue. 

Thanks for reading! - Evy :)