Adding and duplicating related records
You can add records to a related table when you enter data in a record in the current table.
 
Click New Record in the status toolbar.
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If the related field is in a portal, type data into the field in the last row of the portal, then commit the record (for example, by clicking anywhere outside the record or selecting another record).
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If the related field isn't in a portal, type data into the field, then commit the record (for example, by clicking anywhere outside the record or selecting another record).
Duplicate a record that is displaying related data
Select the related record in the portal (making sure the whole row is highlighted), then choose Records menu > Duplicate Record.
Note  You can only add related records from the current table if the relationship has been defined to allow the creation of related records. If a related table is in a write-protected file, or the user doesn't have access privileges to create records, FileMaker Pro doesn't add new records.
Related topics 
Adding and duplicating records
Deleting records
Protecting databases