A system and method for morphing entities in metamodel-based business process model and notation (BPMN) tools is disclosed. A command is received for an entity to be morphed from a first non-abstract entity type to a second non-abstract entity type. A modeling infrastructure (MOIN) returns all non-abstract sub-types or siblings of the entity based on an inheritance hierarchy in a metamodel associated with the entity. The second non-abstract entity type is determined from the non-abstract sub-types or siblings of the entity, and the selected entity is morphed from the first non-abstract entity type to the second non-abstract entity type.