1- Choose source point by clicking any point on the map above

2- Click on the above map to define destination

3- The route will be drawn from source point to the destination point

4- If you want to change source point just click on the new marker that you want to set as new source

5- If you want to change the destination point just click the point and move the mouse where you want to put point

6- You can also change destination point by clicking another time the left mouse button on the map in a place where their is no marker and the destination point will be moved then the route to the new destination will be drawn

7- To view the name of a marker or a source point just hover the mouse on it.