The Windows keyboard shortcut Ctrl Z will perform the Undo action. Undo is a global keyboard shortcut that is usually located in the Edit menu. This keyboard shortcut for Undo is available in Windows 10, Windows 8, Windows 7, Windows Vista and Windows XP. The same keyboard shortcut may also be available with other versions of Windows. App: Operating System
https://keyboardshortcuts.org/windows-keyboard-shortcuts/undo
Like an eraser, if you were to write or draw something and made a mistake you could erase (undo) the mistake. 1  Note: If you make changes and then close the document or program any changes that were made earlier cannot be undone. 2  Tip: In some programs you can also undo actions that are not related to text.
https://www.computerhope.com/jargon/u/undo.htm
Below is a listing of keyboard shortcuts for how you can undo on different operating systems. Tip: Many programs support pressing the above keys multiple times for multiple undo's. In the case of Adobe Photoshop and other programs, you may need to add additional keys to perform a multiple undo. For example, in Adobe Photoshop you press Ctrl+Alt+Z to perform multiple undo's. Tip: The shortcut key to redo an undo is usually Ctrl+Y (or ⌘+Y on a Mac). Practice undoing a cut. Practice an undo by highlighting some or all of the below text and pressing Ctrl+X to cut the text. Once the text is cut, press Ctrl+Z to undo. Apple computer users should substitute Ctrl for Cmd (Command).
https://www.computerhope.com/jargon/u/undo.htm
1 Tip: Many programs support pressing the above keys multiple times for multiple undo's. In the case of Adobe Photoshop and other programs, you may need to add additional keys to perform a multiple undo. 2  Tip: The shortcut key to redo an undo is usually Ctrl+Y (or ⌘+Y on a Mac).
https://www.computerhope.com/jargon/u/undo.htm
Undo is a function performed to reverse the action of an earlier action. For example, the undo function can undo deleted text in a word processor. Some software programs may also have the capability of performing multiple undo's.
https://www.computerhope.com/jargon/u/undo.htm
Use commands on a ribbon by using the keyboard. 1  To move to the list of ribbon tabs, press Alt; to go directly to a tab, press a keyboard shortcut. 2  To move into the ribbon, press the Down Arrow key. (JAWS refers to this action as a move to the lower ribbon.) 3  To move between commands, press the Tab key or Shift+Tab.
https://support.office.com/en-us/article/Keyboard-shortcuts-for-Microsoft-Word-on-Windows-95EF89DD-7142-4B50-AFB2-F762F663CEB2
What is the keyboard shortcut for undo? Below is a listing of keyboard shortcuts for how you can undo on different operating systems. PC desktop and laptop = Ctrl+Z; Apple desktop and laptop = ⌘+Z; Google Chromebook = Ctrl+Z; Tip: Many programs support pressing the above keys
https://www.computerhope.com/jargon/u/undo.htm
The shortcut key for 'undo' is Control Z. Control C is copy, Control V is paste and Control X is cut. The shortcut key for 'undo' is Control Z. Control C is copy, Control V is paste and Control X is cut.
http://www.answers.com/Q/What_are_the_short_cut_keys_for_Undo
Use commands on a ribbon by using the keyboard. 1  To move to the list of ribbon tabs, press Alt; to go directly to a tab, press a keyboard shortcut. 2  To move into the ribbon, press the Down Arrow key. 3  To move between commands, press the Tab key or Shift+Tab. 4  To move in the group that’s currently selected, press the Down Arrow key.
https://support.office.com/en-us/article/Keyboard-shortcuts-for-Microsoft-Word-on-Windows-95EF89DD-7142-4B50-AFB2-F762F663CEB2
Get these keyboard shortcuts in a Word document at this link: Word 2016 for Windows keyboard shortcuts. 1  Note: If a shortcut requires two or more keys at the same time, the keys are separated by a plus sign (+). If you have to press one key immediately after another, the keys are separated by a comma (,)..
https://support.office.com/en-us/article/Keyboard-shortcuts-for-Microsoft-Word-on-Windows-95EF89DD-7142-4B50-AFB2-F762F663CEB2
which key is to undo
The Windows keyboard shortcut Ctrl Z performs the Undo action.  