BackPages
The BackPages ScriptLine is the parent to all the ScriptLines corresponding to elements associated with the "back" of a physical diary (next year's calendar, list of holidays, info pages, phone/address section, glued-in blank page, etc…). The "middle" or "core" of a diary being, of course, the dated pages generated by the Main DiaryGridLine.
As such, it is a simple container and only has 2 properties; Force Start and Page Count.
Since the ScriptLines that can be added as children of BackPages also have a Force Start property, it is usually recommended that you set the ForceStart property of either the BackPages or of its first child, but not both.