Type in an address, or just a city, which would be better. Press the button (don't hit
Enter) and it should zoom into the map on that location. A box will pop up and show two links. One is to set this as your location, and another is to set it as an OPD/O Store location. If you click the first link, it will update your profile information and then refresh the map. If you click the second, a popup box will appear asking you for the name of the OPD/O Store. You may have to enable popups since some browsers block them. Once you type the name, it will refresh and the marker will be there.