Digital comics and graphic books are a special type of book, containing a combination of illustrations and text, frequently shown in a panel format, along with typical book features. You can get a closer look at the images and text by tapping the zoom icon. 

Use the plus and minus buttons to zoom in. And zoom out. Inside your cursor or finger across the screen to move across the pages. When you're finished, zoom out or double-click on the page to return to the standard view.