In the prior version, I could set inPreferences to Extract DDL to the same code window; this is no longer the case. I see in SQL Navigator for Oracle 6.x Preferences an option toset New tab in Code Editor for each object. However, whether it is ON or OFF, SQL Navigator puts the DDL into separate tab.
In addition in 6.x, these options are missing:
1. Extract DDL to same Editor
2. New Editor for each object
Waiting for fix in a future version of SQL Navigator for Oracle.