1. Tap the 
View Mode icon in the Action Bar. If you don't see the Action Bar, tap the center of your screen to bring it up.
2. Choose your preferred view mode:
- Continuous: display one page, scroll vertically
- Single Page: display one page, scroll horizontally
- Facing: display two pages side by side, scroll horizontally
- Cover Facing: display two pages side by side with cover first, scroll horizontally
- Rotate Pages: rotate entire document clockwise
- Thumbnails: display an overview of all pages in smaller grid view
