OverlayPosition

type OverlayPosition = 
  | "top-left"
  | "top"
  | "top-right"
  | "left"
  | "center"
  | "right"
  | "bottom-left"
  | "bottom"
  | "bottom-right";

A named anchor on a box: one of the four corners, four edge midpoints, or the center. Used both for where an overlay attaches to an element (position) and for the overlay's own pivot point (origin).