I live in Hong Kong and have a Samsung 7.inch old type one tablet. I also have the Asus Transformer version 200 quad processor with 96Gig of ram 32 gig SD in the keyboard 32Gig Micro SD in screen and 32 Gig in the machine. However although I have a 10 inch screen I can not display two PDF documents at the same time as I have seen on an Ipad. I have downloaded a dual web screen browser so dual screen of split screen must be possible. But how can I get this facility on my system. I have Just been automatically upgraded to Jelly bean by Asys a really good system. But I need either and App that can do dual windows display of an option from the system. PDF Reader by Adobe on a PC does allow windowing. But the Android version does not seem to support this