Adobe InDesign - A Click And Easy Way To Change Page Views
In addition to the View menu commands in InDesign, you can change the view of your pages via the Pages palette. For example, double-click on a page icon in the Pages palette and InDesign displays that page. Press [option] ([Alt] in Windows) as you do this to fit the page in the window. If you want to view an entire spread, double-click on the page numbers, instead of the page icons.