D-Link AC3150 User Manual page 53

Section 3 - Getting Started
Tap on a file to start the document viewer. In the viewer:
Tap the screen to bring up zoom in/out buttons.
Drag the screen up or down to scroll between pages.
Tap to perform File, Find, Zoom, Reading View, Go To
Page, and Bookmarks actions.
Note: Available actions may differ depending on your Android OS.
D-Link DIR-885L User Manual 49