[parkher]

So they both, T63 and Kepler Pro have the same number of buttons? Only one button on each side? But T63 has them on the top side and Kepler Pro on the bottom?

I hope that with Cool Reader it is possible to map anything to the buttons, for example, you may have with the single click "next page" on both sides and with the double click "previous page" on both sides - if you like.

I feel I would want "toggle internal styles" and "recent books" mapped to the buttons.
As these are things I use most frequently after "next page".
I also like "toggle status bar" (called "Title Bar" in CR) on a button. So that it shows up only when I want to check something on it, otherwise - more space for text.
But there is also long press available for buttons too. And also 9 tap zones. I like next/previous page disabled on touch screen to avoid accidental page turns, but something obvious could be done with tapping the screen.