There are usually two states for the text on PDF doc readers. One, where you don't have the lines wrap, and a second where the width of the PDF is constrained, and the text lines wrap. For some PDF viewers, they will show the original layout when opened, but if you zoom in, the text will reflow within the viewport of your screen, wrapping the text so you don't have to pan/drag to read a line.
Okay, I haven't noticed any reflow behaviour on the Documents app when viewing PDFs.
There are usually two states for the text on PDF doc readers. One, where you don't have the lines wrap, and a second where the width of the PDF is constrained, and the text lines wrap. For some PDF viewers, they will show the original layout when opened, but if you zoom in, the text will reflow within the viewport of your screen, wrapping the text so you don't have to pan/drag to read a line.
Reflow is an attribute for the PDF, not of the reader. If a document has not been marked by the author for reflowing (which includes the document being marked up with additional tags to make reflow work properly) then a PDF reader should not reflow it. But yes, some readers will attempt to reflow even unmarked, untagged PDFs, but that can end is a mess ...
Okay, I haven't noticed any reflow behaviour on the Documents app when viewing PDFs.
Reflow goes against the nature of PDF, which was designed to look exactly the same on all output devices. Therefore the hacks some apps apply to reflow PDF content may not work well on some kinds of documents.
That said, PDF is a considerably bad format choice for eBooks.
