Slide-to-slide movement uses the same HTMX-style page swapping Vyasa already uses for normal document navigation. Left and right arrow keys work, and mobile swipe follows the same left-right model, because even doomscroll-trained thumbs deserve a little consistency.
There are no transitions, overview screens, or deck-specific themes here. This mode is intentionally closer to focused reading than to presentation software trying to distract everyone from the content with ceremonial smoke.