It should display the hierarchies in suitable layouts, i.e. a tree layout for scaffold trees and a similar layout for scaffold networks that arranges the network in its defined levels. The display should be draggable, zoomable, and collapsable. The latter aspect is especially important for scaffold networks that tend to grow very fast with the number of included molecules. For example, all scaffolds below a chosen node should be easily collapsable or only active islands of scaffolds should be displayed when bioactivity data is linked to the given molecules .