Click the 
button on the quick access ribbon toolbar.
Press CTRL+Z.
To undo the last operation with the object:
Click the button on the quick access ribbon toolbar.
Press CTRL+Z.
To redo the last undone operation:
Click the 
button on the quick access ribbon toolbar.
Press CTRL+Y.
NOTE. If the and buttons are not displayed on the quick access ribbon toolbar in the desktop application, the set up panel: add the Repeat and Cancel items from the Home tab.
Constraints on canceling or repeating of operations in the web application:
The undo/redo operations for edited data are executed at once for all changed data that was not saved.
See also: