| WinRT Edition Basic Library > ListBox for WinRT > Working with ListBox for WinRT > Preview State |
In order to have the highest performance imaginable, the ListBox controls can render items outside the viewport in a preview state. Like the standard ItemTemplate, the Preview template defines the appearance of items when they are in a preview state, such as zoomed out or during fast scroll. The controls will then switch to the full item template when the items have stopped scrolling or zooming.