Which property is NOT required to be set when formatting cells displaying specific conditions?

When formatting cells to display specific conditions, ensuring that the appearance aligns with the criteria being evaluated is essential. However, among the options provided, font style is not typically a requirement when establishing conditional formatting, making it the correct answer.

Conditional formatting primarily focuses on elements that directly highlight or differentiate the cells based on the conditions set. For instance, text color and background are key properties because they provide immediate visual cues on whether the value meets the specified condition or not. The alignment of text within the cell can also influence how the information is perceived, but it does not directly relate to the condition being expressed.

Conversely, while changing the font style can enhance readability or aesthetics, it is not critical to communicate specific conditions effectively. Therefore, while font style can be adjusted for visual appeal, it is not a fundamental requirement for the functionality of conditional formatting.