The Defaults section allows you to specify default values for the various modules. This will speed up your editing time because many of the properties will already be configured correctly.
Once you have set your defaults, use the save button to save them. You can also optionally apply some or all of the default to your existing designer configuration. Be careful when using this feature as it will overwrite all the values of the properties within the app. When defaults are applied to your app, the app configuration is immediately published.