It's a familiar situation for every Excel user: you open the Conditional Formatting Rules Manager and discover that the neat little rule you created has somehow multiplied into dozens—or even hundreds ...

In Excel, common causes include using relative references in formulas (so the rule shifts unexpectedly), mismatched data types (e.g., numbers stored as text), or having multiple overlapping ...

Excel's preset highlights work for simple cases, but they quickly break down as your data gets more complex. Formula-based conditional formatting turns static spreadsheets into automated alert systems ...