Is there a modification to the settings that allow a different format for page turning on the Nook Color? I used a Palm Tungsten for years for reading, and in that device the bottom half edges were used for forward page turning, and the top half edges were used for backward page turning. It was more convenient than the requirement that you cross to the other side of the screen to move back as needed. It's also easier for left handed users to use the left side bottom half for advancing and the top left side for going backward. Is this something that can be modified?