moving the text itself
To date, support for this multi-column affordance, though promising, is not completely consistent across reading devices. Developers are aware of the difficulty, and are working hard to provide a remedy.
In order to activate this feature, it may be necessary to click or tap once within the text itself to alert the device to your wishes.
Occasionally, upon returning to a page you just left, it may need to be reloaded in order to find the exact spot from which you departed.