Undo Last Action
Click the Undo button on the toolbar or press the Backspace key to undo the last action or actions entered on the scoresheet. Select the point you want to undo from then click the Undo button. All events above the selected action will be undone.
Caution: Changes you made to a sheet by editing a cell could be changed back by the undo function if you undo past the point when the edit was made. Never edit a cell unless you have no other choice.