STEP 4 - Adding 'Overlay information' to your product
STEP 4 of the order process offers the option to add various levels of Postcode area or administrative area:
These overlays are not compulsory and if purchased as a PDF are included as a separate layer which can be turned on and off so that the information is only visible when you want it. Using the PDF layers simply requires a recent version of the FREE and extremely popular Adobe Reader (Version 6 or later).
Please bear in mind that when purchasing a small area, it is possible that there may not be any administrative or postcode based boundary crossing the mapping.