You should be able to use the pgup/pgdown to go forward and back. We had to disable the arrow keys because they conflicted with the default keys of the image canvas.
With that being said, the next build will have completely new custom keyboard implementation which will allow full keyboard control. We've already added them in our internal build such as arrow keys scrolling, space bar to advance to next page, canvas rotation/reading direction hotkeys, and intend to add more.
Thanks for the feedback! We'll probably add an option for users to customize controls in the future.
With that being said, the next build will have completely new custom keyboard implementation which will allow full keyboard control. We've already added them in our internal build such as arrow keys scrolling, space bar to advance to next page, canvas rotation/reading direction hotkeys, and intend to add more.
Thanks for the feedback! We'll probably add an option for users to customize controls in the future.