Most buildings and area that are placed require workers to produce resources. You have to manage how many workers are in each profession, and modify where they work as your town grows, faces disasters, and changes.
The Professions are as follows:
The profession window show how many citizens are working in each profession, allows you to assign them, and shows how many jobs are currently available.
Increasing the number of workers in one profession will reduce the number of general laborers by one. Likewise, decreasing the number of workers from a skilled profession will increase the number of general laborers.
Pressing the focus button will focus and ccle through all citizens working in the profession.