Below are the steps for adding a UI element to a view, for the purpose of the demonstration i will show you how
to add a text caption but the process is the same for any UI element.
Within the layout tab of the view, right click on the ROOTUIELEMENTCONTAINER within the UI element hierarchy (top right corner) and select Insert Element.
Enter a name and type for the UI element you want to add.
Double click on the created UI element to maintain it properties list. You can change properties such as display text, row count, layout type etc depending what UI element you have entered. Once a change has been made you can press enter to see these changes appear in the layout preview!