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Read PDF documents in Books on iPhone
In the Books app , you can open and save PDFs that you receive in Mail, Messages, and other apps.
Open PDFs in Books
Tap the PDF attachment to open it, tap , then tap Books.
Share or print a PDF document
Open the PDF document, tap , then choose a share option such as AirDrop, Mail, or Messages, or tap Print.
See the Apple Support article About AirPrint.
Mark up a PDF
Open the PDF and tap to use the drawing and annotation tools (tap near the center of a page if you don’t see
).