Creating a Global Page to Display Components on Every Page
A global page functions as a master page.
A global page (previously referred to as Page 0) functions as a master page. Developers can create a separate Global page for each user interface. The Application Express engine renders all components you add to a Global page on every page within your application. You can further control whether the Application Express engine renders a component or runs a computation, validation, or process by defining conditions.
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Parent topic: Controlling Page Layout