The scrollbar can be scrolled manually with the mouse or by using the Page Up and Page Down keys to scroll up or down a page of thumbnail items. You can use the following ImGearThumbnailList methods to programmatically scroll the thumbnails items: ScrollToFirstItem, ScrollToLastItem, ScrollToNextPage, ScrollToPreviousPage, ScrollToNextBand, and ScrollToPreviousBand. The control also contains commands for these which can be used in XAML. You can use the ImGearThumbnailList ScrollDirection method to specify whether thumbnail items are oriented and scrolled horizontally or vertically.