I was wondering how to assign trading routes manually, cuz the only button i could find was Automate Transport when i clicked on a wagon. :confused:

So lets say you want to export food from city A to city B.

Go into city A, select export, set the minimum food you want to have in the city at all times.

Go into city B, select import, set the maximum food you want to have in the city.

Click on wagon and you should see Set Trade Routes.