Use the arrows at the top or bottom left of the document to turn the pages.  Use the “-” or “+” signs to make the document smaller or larger.   If you would like to save a copy to your computer or print a copy, click on the down arrow in the box at the top.  If you would like to have a full screen view, click the last icon on the top.   With the full screen view, the navigation buttons may now only be visible at the bottom of the document.