This image shows a sample sunburst with some nodes that allow further drilling. A node labelled Node 15 on the outermost ring is expanded to reveal three more child nodes, one of which has three children of its own. A minus icon (with the tooltip “Collapse”) on Node 15 can be clicked to hide these children nodes.

On the opposite side of Node 15, Node 68 has a plus icon (with the tooltip “Expand”) indicates that Node 68 also has hidden children nodes.