By default, the GroupHeight property is 22 pixels. The GroupHeight property specifies the height of the caption for all groups, in pixels. Use the BorderGroupHeight, BorderHeight and BorderWidth properties to define the size of the groups inside the control's client area. Use the Font property to specify the control's font. Use the ItemHeight property to specify height of the items in the group's list. The Left, Top, Width and Height properties determine the location of the group's list in client coordinates.