While WestlawNext does not have a search by citation box as Classic does, you can run a KeyCite search from the main search box. To do this, type KeyCite: followed by your citation (ex: KeyCite: 5 u.s.c.a. 552). This search will take you directly to the Negative Treatment tab of a case, or the History tab if no negative treatment exists.
Yellow - the document has some negative treatment
Red - the document is no longer good law for at least one point of law
Blue Stripe - the document has been appealed to the US Courts of Appeal or US Supreme Court (excludes appeals originating from agencies)
KeyCite is more fully integrated into the page on WestlawNext than it was on Classic. Whenever viewing a document that has attached KeyCite information, you will see a selection of tabs across the top of the page.