Video: Modeless Preview Window in the List BuilderWhen you are designing a List control in a UX component, the List Builder is a modal dialog. This means that you need to first close the List Builder before you can preview the UX component to see how your List control looks.
However, while you have the List Builder open, you can now click the Preview button to open a modeless preview window which you can keep open while you are working in the List Builder.
Simply clicking on the Preview button will quickly refresh the preview shown in the window. Watch Video.