The CHAPTER command is used to separate the properties of a Definition into tabbed groupings. The name of the Chapter is displayed in the tab.

System Architect automatically computes the number of controls that fit on a dialog page based on the amount of space available for display. When the space necessary to display the controls exceeds the space available on a dialog page, a new page is added to the tab, and the overflow controls are added to this page: see Pages in tabs.