Press start a call, then ask for something to be explained. The microphone stays open for the whole call — there is no button to hold down to speak.
While Papin is explaining, just cut in. It stops on that very sentence, then answers by annotating an object already on the board — it does not redraw.
You can also click an object on the board to select it, then ask anything — Papin knows which object you mean without you having to name it.
Want to draw yourself? In Write mode, draw a box then double-click to give it a name. A named shape is adopted as a board object — from then on Papin can annotate it and connect to it, instead of drawing its own version beside it.
Demo mode a fixed script about RAG