Pressing the [Del] key erases (clears) the data from the highlighted cells.
What happend when you click on the [Undo] button on the Standard
toolbar?
Clicking on the Undo button (or choosing Undo Clear from the Edit menu) immediately after deleting cell data will restore the data to the highlighted cells. The Undo feature will restore deleted data until another key is pressed on the keyboard. Once another key has been pressed, the Undo feature will not work.