The Gesture Plotter is a gesture-controlled vertical plotter that explores the relationship between human movement and machine expression. As the participant moves their hand in space, the machine translates these gestures into drawn lines, creating a tangible record of embodied interaction. The work investigates how physical presence and motion can serve as a form of authorship, blurring the boundary between human and robotic agency. By framing the machine as both interpreter and collaborator, it reflects on the poetic potential of human-robot interaction.