Excel's filter headers allow you to quickly sort the visible data within a filtered list. Here's how to use them:

1. Apply a Filter: Ensure you have already filtered your data using the AutoFilter dropdown arrows or custom filter criteria.
2. Click the Filter Header Arrow: Locate the column you want to sort within the filtered data. Click the small down arrow in the header row of that specific column.
3. Choose Sort Order: You'll see options like "Sort A to Z" or "Sort Smallest to Largest" depending on the data type. Choose the desired sorting order for your filtered list.

Benefits:

* Sorts only the currently displayed data based on your filter criteria.
* Useful for quickly rearranging the filtered information without affecting the entire dataset.

Limitations:

* Sorts within the filtered view only. Removing the filter resets the sorting.
* Limited to sorting a single column at a time within the filter.

Additional Tips:

* You can combine filter headers with additional sorting options in the "Sort" menu on the Data tab for more complex sorting needs within the filtered data.
* Remember, filter headers provide a quick way to sort the filtered results, not the entire dataset.