One of the more confusing features of PDF apps, as none seems to work quite the same, and removing them isn’t quick or simple.
Preview
The Books app demonstrates how stultified is the approach to text on computers. It’s carefully engineered to work like a book, not to bring any new powers to text or reading.
Tables of Contents, Outline, Bookmarks: what’s the difference, and how portable are they in PDF?
How the quarantine flag for apps and that for docs opened in sandboxed apps differ, and why there are now so many quarantine flags to trip us up.
Have you noticed quarantine flags appearing on movies and PDFs which have never been downloaded? Here’s a possible explanation.
Later this year, in macOS 10.15, one of the media types which will become unsupported is JPEG 2000 still images. Here’s how to find and convert your old images.
Three ways to remove data from PDFs: redaction, deletion of content, and deletion of annotations. Can you trust them, or do they leak data?
Can you get malware in PDF? How far can you trust a PDF, or could it be a forgery? How to sign PDFs, and what data may remain hidden inside them.
Why don’t some PDFs display properly outside Adobe software? Will PDFs ever become more accessible? And what to do when they get damaged?
A close look at just what macOS PDF support and Preview can do well, including a hidden file conversion feature.
