The optimal sizes for pen-input character boxes for Tablet PC

The purpose of our study is to find the optimal size for an input box for handwriting on pen-based input devices. We define an optimal size as including the following characteristics: high performance and high subjective ratings. Handwriting character input boxes differ in size, shape and numbers of boxes according to software applications. The size and/or number of character boxes decreases as the amount of information on the pen-based input device screen increases. However, if designers make boxes too small, handwriting may protrude from the boxes and an incorrect icon or function may be selected. Thus, there is a trade-off between the size of a character box and the infosphere. Therefore, we believe that the determination of the optimal size of a character input box is a fundamental necessity for the design of screens. We seek to determine the optimal boxes for Tablet PC.