1. Click on "Settings"
2. In "Interventions", click on "Geographical area".
3. Name the area to be created
4. Add the postcodes associated with this area
5. Click on "Save the geographical area"
If you have added a colour associated with the newly created geographical zone, the job file will be displayed in the chosen colour on the schedule (provided that the postcode of the job in question is in a created geographical area).