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the ir button is there to navigate around just like a 4 way button would be. up down left right. you can click it to make selections. its also used to turn pages, left and right, or for changing font size, up and down, while reading.
you don't need any of the buttons i you dont want them. use the stylus to select items in the various function menus/ screens or turn pages and access the menu , icon lower left corner, while reading.
the reason they are all there is choice. some wont want to use the ir. some wont want to use the buttons on the left. some wont want to use the stylus for anything but writing.
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