Abstract: A device for making fine adjustments of the vertical registration of a printing press of the type having a master cylinder and a master cylinder gear selectively rotatable with respect to each other. The device includes a shoe releasably secured to the master cylinder gear and a pair of opposed vertical adjustment screws carried by the shoe and bearing against the master cylinder. Fine adjustments of the vertical registration are obtained by securing the shoe to the master cylinder gear and then screwing in one vertical adjustment screw while backing out the other a corresponding amount, thereby rotating the master cylinder and master cylinder gear relative to each other. Controlled rotations of less than about five one-thousandths an inch can be made with ease. Since the shoe is releasably secured to the master cylinder gear, the device can be utilized to make its fine adjustments at any given position of the master cylinder and master cylinder gear with respect to each other.