Grasp the front of the futon under the seat.
Lift the seat of the futon toward the back. Keep pushing the front of the seat up and toward the back of the futon until you hear a click and feel the two sections become free of one another.
Ease the front seat of the futon back down until it is resting on the frame again. The back of the futon will lower along with the seat to create a flat sleeping surface.