Allows you to click any position on the minimap, and go there automatically. A red dot will appear where you have clicked, and will disappear once you reach the spot. You can change the direction you are going at any time by clicking a difference place on the map.
Press "escape" if you are in the middle of going somewhere and want to stop.
This is useful if you do not enjoy long journeys across the map just to get back to your base, ect.