It is extremely difficult to edit a PDF file on a mobile device. It is extremely difficult to change the font size or style, move or remove pictures, change existing formatting and blank existing formatting, or change/remove bulliting/indexing. Eaiser navigation ability with the edit tools. Very difficult to navigate back and forth between tools on my phone. It will only let you edit a/1 section at a time and when you are finally happy with your changes in that 1 little section you notice that it now doesn't fit on the page and just cuts it off and it disappears instead of moving to the following page like it should, and/or messes everything up on the following pages after you just spent hours editing. Extremely frustrating. Would be great if you could edit all of the pages in the PDF file/document in its entirety beginning to end on my mobile device.