Pick up your Apple Pencil and draw on any slide — press harder for a thicker line
Swipe with a finger to move between slides
Top-left toolbar: toggle the pen, pick a color, undo, or clear the slide
2/5
Annotate this
Circle what matters
Underline a key phrase
Cross out what does not
3/5
Your whiteboard
This whole slide is blank on purpose — scribble, sketch a diagram, work a derivation. Each slide keeps its own ink, so swipe away and back and it is still here.
4/5
Why this works
Safari on iPadOS exposes the Apple Pencil through the standard Pointer Events API — a pen pointer type plus live pressure. The pen draws while a finger still navigates, so annotation lives on top of every slide in the deck, with no native app and no plugin.