Presentation Mode
Press p to enter Presentation Mode. The page is split into one slide per section — every heading level becomes its own slide.
Navigate with:
PageDown— next sectionPageUp— previous section
A progress bar at the bottom of the screen shows how far you are in the book, and a small badge in the bottom-right corner shows your position within the current page (e.g. 3 / 12).
Press p again to exit.
Prelude
If the page has content before the first heading (like a short intro paragraph), that content is shown as the first slide.
Combining modes
Focus Mode and Presentation Mode are independent. You can activate both at the same time: press f then p for a clean, distraction-free presentation.