In a document, click on to choose between different reading modes (Themes).
Normal Mode: The default display mode.
Reading Mode: Displays the document in a light-yellow background, so it’s easier on your eyes.
Night Mode: Displays the document in inverse-color (like it is on film negatives).
* Reading Mode and Night Mode are available only for Document 365 subscribers.
You can also change your preference of scrolling between Horizontal and Vertical, and between Single Page and Single Page Continuous.