Abstract: A set of nested graphics for a computer-controlled industrial plant or any other complex system having several interrelated sections. The nested set includes a graphic having entry points thereon each providing access to respective other graphics in the set. These have entry points thereon which provide access to still other graphics so that paths can be established interconnecting the various graphics in the set. The operating mechanism is such that when a cursor is positioned on a given entry point in one graphic being displayed and a SELECT button is pressed, access is then had to a second graphic corresponding to the selected point; and when a NEXT key is operated, this second graphic is displayed. When the cursor is then positioned on an entry point in the displayed second graphic and the SELECT button is pressed, access is had to a third graphic corresponding to the selected entry point, which third graphic is displayed when the NEXT key is operated.