Of all the PDF viewers on macOS, it seems only and support marginal comments, GDocs-style. I wonder why it's so rare.
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Is there a standard format for this? Can't we spin up a nice parallel markup file to contain marginal comments with links to specific bits of the pdf?
(The pdf spec is notoriously painful - likely why so few support comments)
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Actually, yes. w3.org/TR/annotation-
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Wow fragment selectors are not ... elegant. Wonder what a designed for 2021 PDF like format would look like. Strange what standards become the fixed points we work with. LaTeX is not much better fwiw.
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Yeah. You can at least use text quote and text position selectors with PDFs, too, but you're not wrong. Still: I think the format is a drag on progress, but probably not the key blocker. Suspect the latter is more likely to be the lack of a way to profit from UI innovation here.