A sink cover assembly to alternately designate various areas of a dual-basin sink. Cover panel flips on hinge axis generally centered on dual-basin sink to obstruct access to at least one of the basins. The invention includes a method of designating various areas of a dual-basin or multiple basin sink by first securing a base to the sink, hingedly attaching a cover panel, and applying a cover panel over a basin opening and alternately swinging panel to designate areas of the sink. Indicia are used to identify areas.