How to know which setting to maximize protection when I download PDF from external websites?These PDFs are product user manuals which have none of the following:clickable linkmultimedia I am stumped on how to:avoid unknown sender when Product User Manuals are PDFs?test whether PDF is not executable? According to following link avoid unknown sender; ensure PDF is not executable

Is it possible to export setting related to security? Otherwise, it is tedious to change security setting when there is need to open internal and external PDFs on a daily basis,

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