SALES DATA REGISTRATION DEVICE

PROBLEM TO BE SOLVED: To set a screen switching operation to the minimum by setting the ranges of a preset key area for setting a preset key on a touch panel and a function key area for setting a function key and switching the screens of the areas. SOLUTION: Four kinds of setting areas D3-1 to D3-4 of the preset key area for setting the preset key in the display area D2 on the touch panel and the function key area for setting the function key are prepared. When the setting area D3-1 is selected, the range of the preset key area is set to be four rows and six columns and the function area to be four rows and seven columns. When the setting area D3-3 is selected, the range of the preset key area is set to be four rows and ten columns and the function key area to be four rows and three columns. The screens of the respective areas can be switched. The screen switch operation can be reduced to the minimum.