Move your cursor so the navigation symbols appear at the bottom. Arrows for changing pages are at far right and left.Go to the ‘full screen’ symbol in the lower right hand corner. This enlarges the book to a full screen image.
To get out of a publication, click your ESC button or the full screen symbol, and the book will be smaller. Use your browsers back button to return to other publications. Or, go to the top of a page, and click on a desired link.