Editing a Cell Value
To edit the value of a cell, simply select the grid cell and press
            (Enter)
               or you can use the  Start Editing action found in the  menu.
Start Editing action found in the  menu.
         
To stop editing a cell value, press (Enter)
            again or use the  End Editing action
               found in the  menu.
End Editing action
               found in the  menu.
         
To cancel the editing without saving the current changes in the document, press the (Esc) key.
