that is right.

It is also interesting how repligo and ezpdf handle multicolumn pdfs. You just doble tap in a region and they automatically zoom to the width of the column. Then if you tap on the right side of the screen they automatically move to the beginning of the next column. This is exactly what we need on the eink ereader to handle multicolumn documents. They should have a column mode where the next a previous button should do what the taps do in ezpdf and repligo.