The subfiles are specifically filtered items from the Main Matrix. They are grouped into different categories in which all items are ranked by the degree of reactivity.
Subfiles are located on the right side of the main Matrix page.
Click on any subfile to bring up all related items in that category. Check the ones that are of special interest to you, making note of the ones with the highest reactivity values, while also looking for any patterns that may be repeating.
To exit the filtered list, click Return to Main (first file under the subfiles) and you will return to the original Main Matrix results.