Changing the page layout is especially useful when you want to zoom out to get an overview of the document layout. You can use the following page layouts when viewing PDF documents:
Single Page Displays one page at a time, with no portion on other pages visible.
Single Page Continuous Displays pages in a continuous vertical column that is one page wide.
Two-Up Displays each two-page spread with no portion of other pages visible.
Two-Up Continuous Displays facing pages side by side in a continuous vertical column.
You can change the view of a page in 90° increments. This changes the view of the page, not its actual orientation. You can’t save this change.