@ted_p Try posting this in #C466X49JB.
Also, the "Drag&Drop" side of Advanced PDFs is VERY limited compared to Source Code (WYSIWYG). My recommendation is not to create custom fields if you do not have to. Reach out to someone on your team that is familar with HTML/CSS/BFO to get this going for you. If not, a consultant can do this for you in 10 minutes.