An apparatus for the management of time during a visual presentation such as a talk with slides includes an optical emitter surface and focusing assembly for presentation of a progress plot in circular or linear format onto a presentation display shared by a presentation image. A selective switching between a normal large pull-up device and a smaller one in a wordline driver path allows limiting the current in the pull-up circuit to a low value so as to detect shorts because the shorts will cause the active wordline voltage level to drop, while a wordline without shorts will operate well. A novel throat plug assembly is provided for insertion into the throat of the bottle. With the present invention, a compact lighting unit is developed that makes possible a uniformly high yield in a preassigned target region. Then, if the actual amount of marking material transferred to the recipient surface is different than the predetermined standard, the method and apparatus can identify the first marking material transfer device as being a potential source of printing defects.