How to enable the expert user interface?
Certain advanced STACKED settings are only available when using the Expert user interface (UI).
New users start with the Regular UI, which provides a simplified set of settings and recommended defaults. If you need access to advanced configuration options, you can switch to the Expert UI.
Enable the Expert UI
1. Click the STACKED profile icon in the bottom-left corner.
2. Select Settings.

3. Open the User tab.
4. Select Expert as your user interface.

Once enabled, additional settings and configuration options will become available, including Skipping, Throttling, Connect, and Browser settings.