All the cells of negative numbers will become red, while the positive numbers will remain the same. Click Conditional Formatting button in the Styles group. Click New Rule in the menu. Select a style, ...

One custom format field can scale numbers, add icons, apply color rules, and clean up visual clutter instantly.

Learn how to use either of these methods in Microsoft Excel to display negative values in red. To enter a negative value into a Microsoft Excel sheet, precede the value with a hyphen character, (-), ...