After creating the semantic model extensions, you can apply and publish your sandbox or you can apply and merge the customization sandbox into the main sandbox to make the extensions available for processing.
- Sign in to your service.
- In Oracle Fusion Data Intelligence
Console, click Semantic Model
                        Extensions under Application
                        Administration. 
- On the Semantic Model Extensions page, click User
                        Extensions. 
- On the Semantic Model Extensions page, under Customizations Sandbox, hover over
                    an applicable sandbox to view Actions, and then click
                        Merge to Main Sandbox.
- In Confirm Merge with Main, review the message and click
                        Merge.