To find a WEAP object in the schematic by its name, hit Control-F (or menu: Schematic, Find Branch). Partial words are fine, and the search is not case sensitive. If you give multiple words, WEAP will search for objects that include all words (e.g., south city), unless you include OR (e.g., south OR city). To exclude terms precede with a minus (e.g., south -city). Hit F3 (or menu: Schematic, Find Again) to repeat the search using the same search text.
If an object is found, WEAP will zoom to it the schematic, centering it on the screen. If it is a river or link, WEAP will zoom out so that the entire line is shown, flashing it twice. The name will be shown in the status bar at the bottom (until you move the mouse).