Abstract: A transaction terminal includes a touch screen and a control circuit. In a signature entry mode, the control circuit displays a signature entry area and monitors data input into the touch screen. If the input data corresponds to the signature capture area, the control circuit displays a data point corresponding to the valid input data. If the input data does not correspond to the signature capture area the control circuit, in one embodiment superimposes a prompt message on displayed signature data until the control circuit receives valid data.

Abstract: A point of sale transaction terminal having a flat wall surface containing a signature capture pad and further includes electrical lead lines that surround the capture pad and carry signature related data to an x-y register or the like. A lower cover panel is placed upon a wall that surrounds the capture pad so that the panel physically covers the lead lines. The lower cover panel is secured to the wall surface by a relatively strong bonding material which provides a tight seal between the panel and the wall surface which prevents water and dirt from passing beneath the panel. An upper cover panel having a protective window that is mounted within a frame is placed in registration over the lower cover panel so that the window is centered over the capture pad. The upper cover panel is releasably secured to the lower cover panel by an adhesive so that the upper panel can be easily removed from the assembly and replaced in the event the protective window is worn or damaged.