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
Portuguese keyboard layout are specified in the ABNT NBR ("Norma Brasileira Regulamentadora") 10346 variant 2 (alphanumeric) and NBR 10347 (numeric portion) standards. Portuguese keyboard layout There are two QWERTY-based keyboard layouts used for the Portuguese language. Additionally, there are two variants of the Dvorak Simplified Keyboard designed for Brazilian Portuguese. Typewriters in Portuguese-speaking countries generally have a separate extra key for "Ç", and a dead key for each diacritic except the cedilla; so that "Á" is obtained by typing first the acute accent, then the letter "A". The same thing happens with computer keyboards, except when using an "English – International" keyboard layout,