The control's picture is displayed on the control's background. Use the PictureDisplay property to specify the way how the picture is arranged on the control's background. Use the Picture property to specify a picture for a given group. Use the BackColor property to specify the control's background. Use the BackColor property to specify the background color group's caption,  Use the BackColorList property to specify the background color of the group's list. Use the BackColor property to specify the item's background color. Use the DelayScroll property to stop scrolling the groups when expanding or collapsing them.