Not open source, but I use the free demo version of PDF-xchange for the most common editing tools. Highlight and draw boxes and comment etc.
It doesn’t actually matter what you use to edit it.
The key to locking it down is simply to print to pdf as image instead of saving as pdf. I use the “Microsoft print to pdf printer” to do this. It’s in the printing dialogue.
The document is now a fixed picture. This will obviously also ruin the search feature.
Not open source, but I use the free demo version of PDF-xchange for the most common editing tools. Highlight and draw boxes and comment etc.
It doesn’t actually matter what you use to edit it. The key to locking it down is simply to print to pdf as image instead of saving as pdf. I use the “Microsoft print to pdf printer” to do this. It’s in the printing dialogue.
The document is now a fixed picture. This will obviously also ruin the search feature.