To begin customizing your semantic model, create a sandbox.
You can add
                customizations in the non-production environments such as development or test. After
                your customizations are ready, use the Bundles functionality to move the desired
                objects to other environments. See Bundle Your Application Artifacts.
                  
 
- 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. 
- In the User Extensions region, for Customization Sandboxes, click
                        Create Sandbox to create your customizations.
- In Create a Sandbox, enter a Name having up to 80 characters or less, provide a Description, and click Done.
- On the Semantic Model Extensions page, under Customizations Sandbox, hover over
                    an applicable sandbox to view Actions, and then click
                        View Sandbox. 
- On the selected sandbox Details page, click Perform
                        Action, and select as applicable.