Using bookmarks
You can insert bookmarks between pages. A bookmark helps you mark a point within a page, so you can return to it at a later time.
For example, if you are reading an Ebook, insert a bookmark if you need to stop halfway through. When you want to continue reading from where you left off, go to this bookmark.
You can only set one bookmark in each book at any one time.
To insert a bookmark
In the page that you want, press and hold the Back/Options 
button and select Set Bookmark.
To go to a bookmark
In any page, press and hold the Back/Options 
button and select Go to Bookmark.