To add a new Point Of Interest go to "Localisation" > "Local POI" and click "Create New POI".
Once there, enter a name for the POI which will show in the address search tool, for example, a location name or a full address.
Then in the map drag the pointer to the location of the POI, if you need help locating it, you can use the find address tool to zoom you to a certain area so you can drag the pointer.
If you know the GPS co-ordinates, you can enter these instead.
Once done, click "Create New POI"