Enter, Edit, and Delete Data
Sometimes you might do something to a spreadsheet that you didn't mean to, like type the wrong number in a cell. Excel XP allows you to undo an operation. Use the Undo button on the Standard toolbar to recover an error. The last single action is recoverable.
An Undo operation can be canceled by applying a Redo. This is useful when an Undo operation was mistakenly applied. Remember, a redo is possible only if you have not changed an Excel spreadsheet since the last Undo operation was completed: