Asus MeMO Pad - Manual (Page 65)

K0W 
Reading your e-books
When you read an e-book, swipe your finger to the left to proceed to the next
page or swipe your finger from left to right to go back to the previous page.
Chapter list
Search keywords
Marker
Zoom out Text-to-speech function
Bookmark list/Day or
Night mode
Insert bookmark
Zoom in
Page scroll