CheckBoxField is connected with the boolean data type, which can be only true or false. The Source table column has to contain only True/False values. To set up a CheckBoxField for data on whether the car accident happened in an urban area or not, follow these steps:

1. In the Fields tab, in Project Settings, click on the + button, select CheckBoxField from the dropdown menu and fill in the ID, e.g., urban.
   
2. In the next step, fill in the Source name, in this case, urban_area.
3. The last thing remaining is the row named group. This attribute is connected to Charts settings.
4. To confirm the settings, click on the green checkmark button in the top left.