PURPOSE: To obtain a visually balanced centering display and to make the layout of the whole of a table easy to be seen by performing the blocking based on the grouping of table cell data before the centering of table cell data.

CONSTITUTION: As shown in (a), a case where table data composed of 7-byte data is inputted in each table cell in a 5-line and 1-column table is supposed. In this case, the number of column is investigated at first and table cell data is grouped for every column. In this case, the number of group becomes 1. Next, the maximum value of the number of byte of the area where data exists in each table cell within each group is determined. In this case, the value is 3 bytes. Next, the data of each table cell is blocked by the length of MAX=3 bytes, the data is written in a cell block buffer, and processings of a justification to the right, a justification to the left and a centering are performed for each block data for every type of data. In this case, the processing is the justification to the right. Next, the data within justified to the right buffer is written and displayed within the block of each table cell for which the centering is performed.