Substitute character actions than the last one can also be undone by pressing multiple times. was one of a handful of keyboard sequences chosen by the program designers at Xerox PARC to control text editing. Presumably these particular keystrokes were chosen because of their location on a standard QWERTY keyboard, since the Z (undo), X (cut), C (copy), and V (paste) keys are located together at the left end of the bottom row of the standard QWERTY keyboard. Substitute character A substitute character (␚) is a control character that is used in the place of a character that is recognized to be
Keyboard layout so the computer groups them together as the user types. Pressing the Han/Eng() key once switches between Hangul as shown, and QWERTY. There is another key to the left of the space bar for Hanja( or ) input. If using an ordinary keyboard without the two extra keys, the right Alt key will become the Ha/En key, and the right Ctrl key will become the Hanja key. Apple Keyboards do not have the two extra keys. Dubeolsik (두벌식; 2-set) is by far the most common and the sole national standard of Hangul keyboard layout in use in South Korea since