Final answer:
To quickly identify employees who worked overtime in Excel, use conditional formatting with light red fill and dark red text on cells in the range C7:C10 with values greater than 0. This highlights the relevant cells clearly indicating overtime work.
Step-by-step explanation:
To quickly identify employees who worked overtime in Excel, the most efficient method from the options provided is using conditional formatting. Specifically, you would use conditional formatting with light red fill and dark red text on cells in the range C7:C10 with a value greater than 0. This presumes that '0' signifies no overtime, and any number above '0' indicates overtime hours worked. The conditional formatting will highlight these cells, making it visually evident which employees worked overtime.
To implement this, you would select the range C7:C10, then go to 'Home' > 'Conditional Formatting' > 'Highlight Cell Rules' > 'Greater Than' and enter '0' to apply the desired formatting. This will instantly highlight the cells where overtime has been recorded. The other options provided, such as using the SUM function, applying a filter, or using the COUNTIF function, serve different purposes and are not specifically intended for quick visual identification.