What does 'highlight selection column header' do in a worksheet?

The function 'highlight selection column header' in a worksheet serves the purpose of visually emphasizing the column headers that correspond to the cells currently selected. When you employ this feature, the color of the selected column headers changes, making it easier for users to identify which columns are related to the data they are viewing or editing. This distinction is particularly useful in large datasets where keeping track of which data points belong to which columns can be challenging.

In contrast, the other options do not achieve the same function. Disabling the row number display does not provide any visual reference to the active selection. Highlighting selected cells alone would not aid in identifying the headers associated with those cells. Furthermore, highlighting all columns regardless of selection would eliminate the specificity and utility that comes from knowing exactly which column headers correspond to the selected data. Thus, changing the color of the selected column headers is the most effective and relevant function in this context.