Sort articles
You can sort articles by attribute values, either ascending or descending, by clicking the 
then selecting the attribute. Sorting is configured at the catalog level. You can also select Custom sort from the menu to sort articles based on attribute values. When this option is selected, the following window appears:
Select the attribute, its values are displayed in the Available values section as shown in the below example:
You can click the checkbox next to any of the values then move it to the sorted values section and drag the values and drop them according to your preference, and click Save. Based on the selected order, articles are sorted.