This filter option toggles how the layout detection of i-net PDFC will react to PDF files. By default, i-net PDFC will try to detect the layout of the document pages to some extend. But with this option activate, the original print order of the file will be used. It's recommended to only use this option if the document is a PDF that was generated by a text processor.
For further details can be found on the page of this parser extension.