Create lines for Journal Transaction from Invoice screen

You could add lines to the Journal Transaction Details tab in 2 ways. Overriding logic for creating Journal transaction records or override Release button on Invoice screen. I used a second approach with the handler.

First of all you are taking graph of journal transaction on its creating and then adding handler to RowInserted property for main table and inside this handler you have access to all invoices that now processed to Journal transaction and you could now easily change logic for adding items to Details tab