Online Documentation for SQL Manager for Oracle
Redo Log Groups
One or more Redo log file groups can be added to the specified thread or instance, making them available to the instance to which the thread is assigned.
Redo Log Group Editor allows you to define redo log group properties. It opens automatically when you create a new redo log group and is available on editing an existing one.
To open a redo log group in Redo Log Group Editor, double-click it in the DB Explorer tree.