If you want to enable an application for the first time and customize it, refer to Enable an Application using the UI - Essential.
You can customize the applications that are deployed to your Management Cluster using the UI:
Select Applications from the sidebar to browse all applications.
In the Application card you want to customize, select the three dot menu and Edit.
To override the default configuration values, select Configuration in the sidebar.
To customize an application, copy your customized values into the text editor under Workspace Application Configuration or upload your YAML file that contains the values:
Confirm the details are correct, and select Save.