How can I add custom columns and layout to a seeded report in Oracle Fusion?

Hi everyone,
I’m working with a seeded report (Funds Capture Authorization and Settlement Formats) in Oracle Fusion Receivables, and I need to add custom columns to the output. What’s the correct approach for extending or customizing seeded reports in this module?

The seeded data model only uses the following query:

SELECT DOCUMENT_CLOB
FROM IBY_TRXN_DOCUMENTS
WHERE TRXN_DOCUMENT_ID =: TRXN_DOCUMENT_ID