To change your page width:
Note Changing the Width value will change the width of all pages in your lesson.
You can configure pages in your lesson to have different heights, if necessary.
To change the height of the current page, you can either:
To change the height of the all pages, including your master pages:
Note If you later want to make specific pages use different heights, uncheck the Apply height to all pages box. Changes that you then make to the height will not affect other pages in the lesson unless you re-check the box.