ह्या कंट्रोलमध्ये बदल केल्यामुळे हे पेज ऑटोमॅटिकली अपडेट होईल

Display a PDF as a slideshow in Preview on Mac
You can display the pages of a single PDF as a slideshow.
Go to the Preview app
on your Mac.
Choose View > Slideshow.
The pages of the PDF are displayed in the slideshow.
Use the controls at the bottom of the screen to move from page to page or end the slideshow.