Need to perform a mass action on only a subset of your list? You don’t have to create a special one-off list just to narrow down your targets. Mass actions now work on your list view search results or the results from your related list quick filters. To perform a mass action on your results, apply your search terms or filters, and then select all or a subset of the results. Clear your search terms or quick filters to get back to working on the bigger list.
Where: This change applies to Lightning Experience in Group, Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.