Similar to the other invisible ink request, but with a twist. An ink that only shows on the iPad, so that a person can create fill-in the blank notes that don't show the answers to people watching on a remote monitor, or freehand drawings live, drawing over previously created lines, giving the illusion to the audience or recording that the freehand drawing is being done from scratch. Kind of like a painting over light pencil marks, but in this case, the pencil can only be seen on the iPad, not on the monitor or quicktime recording that the iPad is broadcasting to.