Click on one of the column names to sort by a given criteria or city name. Click again to sort in the oposite direction.
Click on one of the table rows to select a given city on the map, and mark critera values on the range select controls. You can also hover over the map markers to achive the same thing.
Use the icons to open profile pages for coresponging cities.
Select two cities holding the ctrl key down to open a detailed comapison.