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Display PDFs and images as a slide show in Preview on Mac
You can open and display multiple PDFs and image files as a slide show. You can also display the pages of a single PDF as a slide show.
In the Preview app
on your Mac, open each file that you want in the slide show.
If you open a single PDF, the pages of the PDF will be displayed in the slide show.
Choose View > Slide show.
Use the controls at the bottom of the screen to move from page to page or end the slideshow.