Ebook mobile usage

Everything is working fine, but reading ebooks on devices lacking a keyboard is lacking. Unless I'm missing an option for enable a touch interface that lets you go next/back by touching the edges.

I do see two buttons appear briefly as the ebook loads, but the ebooks I'm reading are manga (and I don't want to convert them) and so the "page" is an image that loads on top of them. Is there an option to push the page down below the buttons?