By default, the thumbnail control displays no borders. Use the Appearance property to change the borders of the thumbnail control. Use the Borders property to specify the size of the margins where the thumbnail picture is displayed. Use the Picture property to display a picture on the control's background. Use the PictureDisplay property to layout the control's Picture on the background. Use the BackColor property to specify the control's background color. Use the KeepOriginalThumbnail property to specify whether the thumbnail displays its content using a transparent color.