The DX screen is almost 8" high, or long if in landscape. If you use a smaller font size then 7.9" is an awfully long line of text to read without physically moving your head. Some people actually prefer holding their DX in landscape mode. So with a little imagination you should be able to see why two columns of text would be good for some people. I'm not talking about the iPad's cheesey looking similated book pages. I'm talking about two columns, each about the width of the K2 and K3 screen in portrait mode. It looked and worked great on the Sony 900 so I know it would look good on the DX. Not everyone would like it, but some would. Now on the K2/K3 it probably would not be very good because the screen is too small.