To change view, select desired zoom level and window size from the options below the Zoom View window and then click on the image. The display will be centered where you click. To move up, down, left, or right within a zoom level, click near the edge of the image in the Zoom View or select an area in the Navigator View. The red box on the Navigator View indicates the area of the image being viewed in the Zoom View.

CREDIT: Ellicott, Andrew, surveyor. "Plan of the city of Washington in the territory of Columbia: ceded by the states of Virginia and Maryland to the United States of America, and by them established as the seat of their government, after the year MDCCC / engrav'd by Sam'l Hill, Boston; in order to execute this plan, Mr. Ellicott drew a true meridional line ... " s.n., 1792. Map Collections: 1544-1999, Library of Congress.