Setting Rules for Error Checking

When Excel does background checking of your worksheet for errors, it follows a set number of rules. You can modify the rules that Excel follows through these steps:

1. Click the Office button and then click Excel Options. Excel displays the Excel Options dialog box.
2. Click Formulas at the left side of the dialog box. (Click here to see a related figure.)
3. Make sure the Enable Background Error Checking check box is selected.
4. Clear or set the checkboxes in the Error Checking Rules area of the dialog box, each of which specifies a different error-checking rule that Excel can follow.
5. Click OK.