pageUp(_:) Moves the visible content region up by a page. Declarationoptional func pageUp(_ sender: Any?) See AlsoScrolling ContentscrollPageDown(_:)scrollPageUp(_:)scrollLineDown(_:)scrollLineUp(_:)scrollToBeginningOfDocument(_:)scrollToEndOfDocument(_:)pageDown(_:)pageDownAndModifySelection(_:)pageUpAndModifySelection(_:)centerSelectionInVisibleArea(_:)