Yep, when you open a PDF in GraphicConverter (or Photoshop or any other pixel image editor), the PDF is destroyed. Everything in the PDF is broken up into pixels. This means that text is no longer text and that all content such as liks, notes, annotations, and so on are removed.
Editing a PDF in a pixel-based image editor is almost always a bad idea. There are PDF editors that let you edit a PDF directly without destroying it. What edits do you do?
