Fields

After you have at least 2 pop in the city, on the city detail screen, right side, bottom, there is an area describing the pop units, and what they are doing. When nothing, the page offers to assign that pop unit to the actually selected square on the map. So far i only tried adjasent quares to the city, but it will work most likely in a greater range later.

An assigned pop unit can be de-assigned with the X button right to it.