Node scrollers

Techniques employed in displays of graphs with large numbers of nodes for viewing details of an area of interest while preserving context. The techniques take advantage of parent-child and sibling relationships. Sibling nodes and children of sibling nodes are displayed in rows. The center of interest is at the center of a row and nodes at the ends of the rows overlap. A parent node may have a node scroller associated with it for viewing the parent's child nodes one page of nodes at a time. The node scroller includes paging buttons and may also include a scroll bar with a slider. The node scroller may be displayed on the parent node itself or on the links connecting the parent node to the page of children currently being displayed. Also disclosed are details of the implementation of a preferred embodiment of the node scroller and details of an application programmer's interface (API) for creating and manipulating node scrollers.