By moving the slider (top right) you can zoom in on the map. To zoom in even more enter a larger number in the % box (eg 400).
You can drag the map around to see the whole area, or use the horizontal and vertical slide bars.
Panoramic View of River Usk, Wharves, Docks and Bristol Channel 1936
The view from the Transporter Bridge looking roughly south.
Source: Book, "Newport Harbour Commission Centenary 1936"
RH John Ltd.