The map viewer allows you to view the entire map sheet in the window. You may choose to zoom in, recenter, and adjust the window size to view specific portions of the selected map. Click on a particular area of the map to zoom in directly to that portion of the map.
You may print or download from the map viewer. Click the "Download Map" link to open a PDF formatted file that you may save or print. To Print from within the map viewer, click the "Print Current Map View" to print the map as you see it on the screen (i.e., if you've zoomed into a specific portion of the map, that is what will print).
This is a screenshot of the Washington, D.C. 1888, Sheet 0_a, which shows the Executive Mansion, The Mall, the Washington Monument, the Smithsonian Institution building, and Judiciary Square.
Use the blue arrows to move the image up, down, left, or right. If you wish to print just what you see in the viewer (i.e., what you've zoomed in on), click the "Print Current View" button to launch the print preferences window.