PDFs are really meant to be an end product. Some can't be edited at all, then you have to treat them as images and use OCR.
Quote:
|
My scanned books are supplied as PDFs. The visible pages are images, but they have backing text.
|
That's unproofed OCR. It can be extracted (tools depend on OS) and then edited in LO Writer.
The only foolproof method is to edit the source used to build a PDF!