Pages serve the purpose of input, output, and control. Pages are views of data or process information designed for on-screen display only. Pages are also user data entry vehicles.
Pages are made up of various combinations of Controls, Properties, Actions, Triggers, and C/AL Code.
Controls provide the user with ways to view, type, and edit text, choose options or commands, initiate actions, and view status.
Properties are attributes or characteristics of an object that define its state, appearance, or value.
Actions are menu items (which may be icons).
Triggers are predefined functions that are executed when certain actions or events occur.
The internal structure of a page maps to an XML structure, some of which is readily visible in the Page Designer display while the rest is in the background.