For tenants, the contacts section allows for easy communication amongst roommates and the landlord. With your super or landlord and roommates, you can create or check on maintenance ticket progress or other issues around the house. If you were added to the unit's ManageCasa account by another roommate or by your landlord, the existing tenants will automatically show up as contacts in the property you were added to.
If you wish to add more people, like another roommate or a new handyman, simply press "Add Contact" in the top right corner, and add in a new contact. If you add a new roommate, indicate which property you are adding them to.
Once they are added to a property, all members of the property will be able to see a new roommate has been added.