I think you mean "PDF Reflow", which the eDGe has always had. It basically drops all the formatting and simply displays just the text.

For PDFs that are just text anyway this often works really well. However, some PDF producers do odd things with how they actually represent the text in the PDF, resulting in things like each line of text appearing to be a single paragraph in PDF Reflow. Multi-column PDFs are generally unreadable in PDF Reflow because in the PDF you don't actually have 2 columns but rather a bit of text (i.e. a line from Column 1), a space, and a bit more text (i.e. a line from Column 2), and then the next lines from each column, etc., resulting in the PDF Reflow effectively showing an interleaving of the text from both columns.

For PDFs with tables and diagrams, you still get the text, but you lose the tables and diagrams.