From a Work, Expression, Manifestation, or Item (WEMI) record, or Person, Family, or Corporate Body (PFC) record (as appropriate):
In the Text box of an appropriate relationship element:
Choose the appropriate 'Create new …' option
Choose an appropriate template
Enter data as needed
RIMMF will make the link from the WEMI record to the PFC record, and will back-link from the PFC record to the WEMI record
Add links to data for other related PFC entities, as needed