The plotting bed, in stationary page plotters, is the surface upon which the paper rests while the image is printed. The printing head moves the pen just over the surface of the paper. It depresses the pen into the page wherever a point or line is desired. A rolling-page plotter does not have a plotting bed. As the paper is fed (either by friction feed or tractor feed) through the plotter, the pen stays in one horizontal line printing upon the paper as it passes.
