scrollPageDown(_:) Scrolls the content down by a page. Declarationoptional func scrollPageDown(_ sender: Any?) See AlsoScrolling ContentscrollPageUp(_:)scrollLineDown(_:)scrollLineUp(_:)scrollToBeginningOfDocument(_:)scrollToEndOfDocument(_:)pageDown(_:)pageUp(_:)pageDownAndModifySelection(_:)pageUpAndModifySelection(_:)centerSelectionInVisibleArea(_:)