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Undo is an interaction technique which is implemented in many computer programs. It erases the last change done to the document, reverting it to an older state. In some more advanced programs, such as graphic processing, undo will negate the last command done to the file being edited.
Ctrl+⇧ Shift+⌘ Cmd+4 then click+drag mouse over required area: Print Screen click+drag mouse over required area, then ↵ Enter : Ctrl+⇧ Shift+Show Windows then click+drag mouse over required area Screencasting Ctrl+Alt+⇧ Shift+R (GNOME [10] [11]) Ctrl+⇧ Shift+Show Windows then select the Screen Record button on the toolbar Screenshot ...
Control-Z (or ⌘ Command+Z) to undo; Control-X (or ⌘ Command+X) to cut; Control-C (or ⌘ Command+C) to copy; Control-V (or ⌘ Command+V) to paste; The IBM Common User Access (CUA) standard also uses combinations of the Insert, Del, Shift and Control keys. Early versions of Windows used the IBM standard.
Larry Tesler created the concept of cut, copy, paste, and undo for human-computer interaction while working at Xerox PARC to control text editing.During the development of the Macintosh it was decided that the cut, paste, copy and undo would be used frequently and assigned them to the ⌘-Z (Undo), ⌘-X (Cut), ⌘-C (Copy), and ⌘-V (Paste).
A Control key (marked "Ctrl") on a Windows keyboard next to one style of a Windows key, followed in turn by an Alt key The rarely used ISO keyboard symbol for "Control". In computing, a Control keyCtrl is a modifier key which, when pressed in conjunction with another key, performs a special operation (for example, Ctrl+C).
DC3 / Ctrl-S 8: U+0014 20 024 Device Control 4: DC4 / Ctrl-T U+0015 21 025 Negative-acknowledge character: NAK / Ctrl-U 9: U+0016 22 026 Synchronous Idle: SYN / Ctrl-V U+0017 23 027 End of Transmission Block: ETB / Ctrl-W U+0018 24 030 Cancel character: CAN / Ctrl-X 10: U+0019 25 031 End of Medium: EM / Ctrl-Y U+001A 26 032 Substitute character ...
(⌘ Cmd or Ctrl) + Z: Redo (⌘ Cmd or Ctrl) + ⇧ Shift + Z: Copy selection (⌘ Cmd or Ctrl) + C "Copy" in context or browser menu Cut selection (⌘ Cmd or Ctrl) + X "Cut" in context or browser menu Paste selection (⌘ Cmd or Ctrl) + V "Paste" in context or browser menu Add a link to selection or current word (⌘ Cmd or Ctrl) + K ...
Used together with a modifier key, such as Alt, ⌥ Opt, ^Ctrl or a combination thereof, they may act the same as the Page keys. In most operating systems, if the Page Up or Page Down key is pressed along with the ⇧ Shift key in editable text, all the text scrolled over will be highlighted .