Have you ever built a list using the Advanced Search only to find that several of the items should not be in the list? Now its easy to remove them from the Advanced Search features, without having to change the originating list criteria.
Simply click to select the item(s) to remove and use the “Remove from results” feature which appears on the toolbar as shown below.
There is nothing to do with this new feature except to update to the March 2019 or later update.