The QTabDialog class provides a stack of tabbed widgets. ... virtual void  show  ()  . ... A tabbed dialog is one in which several "pages" are available, and the user selects which page to see and use by clicking on its tab, or by pressing the indicated Alt-(letter) key combination. ... QTabDialog provides an OK button and optionally Apply, Cancel and Defaults buttons. ... Providing Apply, Cancel or OK buttons on the individual pages is likely to weaken the users' mental model of how tab dialogs work. ...