Keyboard is mainly used for text input, and has function keys and shortcut keys to reduce the number of manual operation. However, it is difficult and troublesome to memorize relations between keys and functions for beginners. In this paper, we propose two intuitional input methods on the physical keyboard in addition to usual texttyping: stroke that traces a shape on the keyboard, and stamp that presses a shape on the keyboard. Our system automatically classifies user inputs into texttyping, stroke, or stamp from key entry information, enabling us to seamlessly input those commands without additional devices.
