Group study, a shared problem set, a lab partner marking up the same reading. Until now that meant exporting, sending, and merging by hand. Lectra now lets two people open the same document and annotate it at the same time: your partner's Apple Pencil strokes appear on your page as they draw them, and yours on theirs.
Making live ink feel instant without turning into a mess took some care. Apple Pencil reports well over a hundred points a second, so Lectra sends a steady, smoothed stream instead of flooding the connection. Each person's marks land on their own layer, so nobody overwrites anyone else's work, and every device converges on the same final page even when edits arrive out of order.
It's also built to survive real life. You can keep annotating with no signal at all, and the moment you're back online your work syncs and catches up on anything you missed while you were away. Sharing is per-document, and if someone's access is removed their live session stops cleanly while their own local copy stays intact.