The term child pages refers to a group of pages that are beneath the same parent page.
Default child template
A child page of this page will use this template by default.
Child ordering policy
Sets the order of child pages of this page. Manual ordering can be set by dragging and dropping from the list using the Re-order button.
Update existing child pages
Applies the changes to all the child pages of the page.
Children visible in nav
Hide the child pages from an in page navigation layout (where configured in a template) for website visitor views.
Children visible in CMS nav
Hide the child pages from an in page navigation layout (where configured in a template) for CMS user views.
Default child URI prefix
Set the URL format for pages created as children of this page.
This is useful when you want to shorten the URLs for a certain type of page, ie: news stories - when the news section is at www.domain.com/section-name/news/news-story-title then, by setting a short URL as /news/ all news stories can have the URL www.domain.com/news/news-story-title
Default grandchild template
Set the template for any children of the children of the current page (!) This is useful when creating sections that will have levels of content created by users with reduced CMS permissions.