Steinberg presents the horizontal picture plane as being one of the most prominent creations or shift in the modern art world. He argues that it readmits the artist with his full human interests into making a picture that an audience can engage in different levels. Pre-established categories of painting, according to him, are thrown out because of the shakeup that the horizontal lineup introduced. The picture plane shift that is observed by Steinberg is called the flat bed analysis. He gives it this name because the picture is understood as spread out on a flat bed. It is this important characteristic that differentiates it from the works of the past. The works of the past had a preconceived plane where an art work was drawn from head to feet. The work was a conception of the world and the erect human posture was the basis for this kind of representation. Painting of artists such as Pollock who poured and dripped pigment on canvas and allowed them to flow vertically created a sense of confronting and conformation with the natural human posture.