Try Conditional Formatting:

Select the cells to be impacted

From the Excel main menu:
<format<coditional formatting
Condition 1:
Cell value is: less than 0
Click the [Format...] button
Set the font to: Red, Bold
Click the [OK] buttons

Is that something you can work with?

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Regards,
Ron

XL2002, WinXP


"Tommy" wrote:

I have 2 columns a and b I take the answer from a1 and substract it from a2
then the answer goes in b2. what i want is the answer in b2 to be bold if its
a negative number. what do i need to do.