Records can be related in various ways. When two records of the same record type are associated with each other, they are related, and the relationships can be seen on the Relations page of each record. You can only relate records of the same type on the Relations page. For example, when two Contacts are associated with each other, such as one Contact is the supervisor of another Contact, that association appears on the Relations page.
If the record types are different, the association between them is shown on a page other than Relations. For example, when two Contact records are associated with an Appointment record, the two contacts are listed on the Involved page of the Appointment, not the Relations page, because Contact and Appointment are different record types.
A record can have none, one, or multiple relations. Contacts have relations, as do all custom record types, and the Project record type. Other record types do not have the Relations feature.
