When the cell highlighter is displayed, you can click on the cell you want to edit. If a mouse is not available, you can use the following:
To move one cell to the right without using a mouse, press the ENTER key.
To move to any cell in the grid without using a mouse, press and hold the ALT key and then press the arrow keys on the keyboard.
To edit the highlighted value, you can use the arrow keys, the DELETE key and the BACKSPACE key to edit the number within the cell.
To undo any typing in the highlighted cell, press the ESC key or press CTRL+Z.
After you have finished editing values on the Data OK? screen, click Yes to save the data.