Search for a particular place name using the panel to the left of the map, typing in all or part of a place name into the search box and pressing enter or clicking on the magnifying glass. The search will find all matching place names, so a search for 'don' will return both 'London' and 'Doncaster'.
If your search returns results, the map will automatically zoom to the best level to include all the matching records which will be indicated with a red marker.
Clicking on the marker with your mouse will open a popup box with more information about the settlement as it was recorded on the Gough map. The popup can be closed by clicking on the cross in the top corner of the popup.
The first tab, marked 'Details' contains a link to more information about that feature on a separate page.
The second tab on the popup shows the selected feature located on a modern map to help contextualise the feature (the modern map is only available when a settlement is clicked; other layers don't record this information).
Instead of searching for a specific settlement, you can also use the 'Browse' tab to the settlements listed in alphabetical order.