A computer-implemented method includes, on a client system, displaying a translucent overlay over a first web page displayed in a browser. A plurality of visually distinct sections of the first web page is displayed on the translucent overlay. Each section corresponds to a plurality of hypothetical browser sizes used to view the first web page. In each respective section a percentage corresponding to one of a portion of the community of users that can see or cannot see at least the respective section is displayed.