By default, the CaptionRotate property is exHTMLHorizontal, which specifies that the HTML text is horizontally displayed. Use the Caption property to specify a caption to be displayed on the thumbnail. The SingleCaption property indicates the expression to generate the HTML caption to be displayed on the thumbnail, when the control shows a single thumbnail ( for instance you filter and you got a single result ). Use the Alignment property to specify the caption's alignment. Use the Boders / Margins / Padding property to specify the size of the margins where the thumbnail is displayed.