You can use this dialog box when you're:
•Searching for a site for which you have no location information apart from that it's near a certain town or village.
See To locate a site without a postcode or grid reference
•Searching for a site to develop
See To search for sites to develop
It allows you to:
1.Search for a site on a map layer such as VML Raster.
2.View it on a Detail map layer (or any other map layer apart from aerial or historical).
3.Go back to VML Raster to search for another site.
4.Create a new Detail map centred on the new site.
If you simply went back to the Detail layer after step 3. you would find that it was still centred on the site you found in step 2.