How do you turn off the filter for the mfr column?

To turn off the filter for the "mfr" column in a spreadsheet application like Excel, first click on the drop-down arrow in the header of the "mfr" column. Then, select "Clear Filter" or "Filter Off" from the options. Alternatively, you can go to the Data tab on the toolbar and select "Clear" to remove all filters applied to the sheet. This will display all the data in the column without any filtering.