By default, the Width property of the link is -1, which specifies that the control's LinksWidth property indicates the width of the link. The Width property specifies the width of a particular link. The Width property specifies the size of the link and so the size of the arrow. The Color property specifies the color to show the entire link. The ShowDir property specifies whether the arrow of the link is shown or hidden. The Visible property indicates whether the link is visible or hidden. The ShowLinksWidth property specifies the width to show the incoming, outgoing or collapsed links.