To start your search, click on the map of Scotland on the left in roughly the area you are interested in.
On the next screen you will be able to draw a shape on the map, and select search criteria such as minimum and maximum prices.
Draw the shape by clicking on the map to add at least 3 markers - you can drag them to adjust their position, or click on one to remove it. You can add as many markers as you wish - each one will act as the corner of a polygon.
You can also select a price range, number of bedrooms etc, and once you have created your search you're able to save it in a cookie on your machine.