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
Dvorak Simplified Keyboard English text, keyboards for other languages would likely have different distributions of letter frequencies. Hence, non-QWERTY-derived keyboards for such languages would need a keyboard pattern that might be quite different from the Dvorak pattern for English. Whether Dvorak or QWERTY, a United Kingdom keyboard differs from the U.S. equivalent in these ways: the " and @ are swapped; the backslash/pipe [\ |] key is in an extra position (to the right of the lower left shift key); there is a taller return/enter key, which places the hash/tilde [# ~] key to its lower left corner (see picture). The most notable