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At the moment, Datagrok does not offer a full-fledged, bullet-proof undo functionality, however some actions could be undone by pressing Ctrl+Z:

  • Changing cell value by manually editing it in a grid
  • Clearing the layout (View | Layout | Clear)
  • Removing selected rows or columns (Shift+Delete)
  • Closing a viewer by clicking on the x icon

Maximum one operation could be undone.