1. Open up to a file you're reading.
2. Tap on the glasses icon on the right side annotation bar.
3. Press on the eye icon at the bottom of the bar.
4. Locate the "Scroll Pages" Option and tap to choose between "Vertically" or "Horizontally." Vertically will allow you to scroll up and down on the article, and horizontally will be to scroll left and right. Switching this option will change the scrolling pages settings for all articles.