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3. In file list menu, tap file extension
name pdf file.
＊It appears the current page and totall
pages on the bottom of screen.
＊Tap to select the best
reading ratio, provides 10 types of
ratio including 400%, 200%, 150%,
125%,100%, 50%, 25%, 12.5%, fit
page( fit the size of screen), fit width
（fit the width of screen）.
＊Tap to turn previous/next page,
＊Tap to turn previous/next ten
pages.
＊Tap to memorize previous
action.
＊Tap right and bottom scrolling bar to
view up and down.
＊Tap to return to previous
screen.