Some psychics can reproduce a drawing that someone else has drawn without showing anybody.
They would like you to believe that they’re using their psychic powers, but that would be impossible.
More likely, it’s the same methods magicians use.
It’s another old trick, and there are lots of ways to do it, even without having a confederate looking over the person’s shoulder.
Some magicians will simply look at the indentation on the page, but if they want a sure bet, they’ll use a piece of carbon paper or carbonless paper a layer below the top page to give an instant copy which they can glance at and then quickly duplicate.
Basic shapes can also be discerned by watching the movement of the person’s eyes and the end of the writing utensil.