Go to "My WEBKiosk" --> "Tasks" --> "Edit Design".

Then click on the little pen icon in the white box.

Here you can choose, if a specific collection or all collections (associated with the WEBKiosk) should be displayed in the WEBKiosk.

If you want to show the collections separately, we would suggest you to create more Document Widgets.

Here you learn how to connect a collection with the WEBKiosk