I am learning to use iBooks, but I have one major disappointment in that I cannot get Braille to sensibly and continuously scroll, and related to this, I cannot adjust the scrolling speed. If I press r-chord the display advances far too quickly - seeming to miss whole sections as it races to the end. Manually panning works smoothly, and auto page turning in settings functions properly for me. I have several displays to choose from, and the unhelpful autoscrolling happens regardless of display. Using an iPhone 6+ with latest operating system. Speech is muted. All suggestions appreciated - thank you.