ctrl Z [no undo for this action]

Control-Z was one of a handful of keyboard sequences chosen by the program designers at Xerox PARC to control text editing. It is used to undo the last cut-and-paste operation performed by the user. 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.

Elemental. Básico. Gracias L.