Column Auto Filter is the filtering device which only displays the data rows corresponding to the values selected by user among the non-duplicated values of data cell belonging to the column. It can be used in conjunction with the existing Column Filter.
Although all values are basically non-duplicated values in the displayed list, you can also list the values of interval units by specifying valueScale. And, you can also specify the maximum number of list items which will be displayed in filter selection box by maxCount property. If it is beyond the maximum number, the link of listing the next items will be added as the last item.
The Default Property is active.