Hi Garima,
Using the Backup Wizard
1. Start the Backup Wizard.
2. If you have not yet created a backup medium, do this now. Proceed as described in Creating a Single Backup Medium. Select a backup medium in the window Media for Backup.
3. Check the information, and change it, if necessary (see Changing Backup Media).
4. You can activate or deactivate automatic log backups, depending on the status of your system. Once you activate automatic log backups for your system, this setting remains active until you deactivate automatic log backups again. Automatic log backups also remain active when you restart the database instance.
Using the Database Manager GUI
If you have created backup media, you can also use the Instance menu to activate (Set Auto Log ON) or deactivate (Set Auto Log OFF) automatic log backups.
Regards,
deepak Kori