How to Change the Driver Route

I understand that the driver route can be changed, however, I do not see where you do this. There are supposed to be yellow flags on the route, but I do not see them.

Thank you

Hi there, on each driver next to the magnifying glass there is there icons, one is a + magnifer, one is an i for information and one is x for delete. If you click on the i for information it brings up a list of all the allocated jobs to that driver. You can move these about using the move up and move down buttons at the bottom of the screen. I hope this helps!