Excel's Formula - sisman

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Part V: Miscellaneous Formula Techniques
Figure 21-12: Clicking an error’s Smart Tag gives you a list of options.
You can choose Formulas➜Formula Auditing➜Error Checking to display a dialog box that
describes each potential error cell in sequence, much like using a spell-checking command. This
command is available even if you disable background error checking. Figure 21-13 shows the
Error Checking dialog box. Note that this dialog box is modeless, so you can still access your
worksheet when the Error Checking dialog box is displayed.
Figure 21-13: Using the Error Checking dialog box to cycle through potential errors identified by Excel.
It’s important to understand that the error-checking feature is not perfect. In fact, it’s
not even close to perfect. In other words, you can’t assume that you have an error-free
worksheet simply because Excel does not identify any potential errors! Also, be aware
that this error checking feature won’t catch a very common type of error — that of
overwriting a formula cell with a value.