Here's how to set a default publishing agreement for a writer:
1. In your Network, hover over a contact and click the Details button. This will show you some simple details on the writer.
2. Click the Pub. Agreements tab to see the existing publishing agreements.
3. Click ... on the agreement and click the Set as default option to set the default.
4. The agreement will now have a star on it and will be applied automatically when the writer is added to a song.