This idea has been merged into another idea. To comment or vote on this idea, please visit FENXT-I-1597 Capability of inserting rows in journal entry..
The ability to make edits to an existing batch by inserting lines/rows should be standard. It's a feature currently in the database/legacy view. If a user has updates to make to an existing batch, having to delete existing lines to have the flow of the transaction make sense is inefficient.