I have bad vision and get my college books in alternate media pdf format. I use a screen reader (pc reads pdf outloud). I'd like to get a tablet. Does the FIre HD 8.9" read pdfs outloud? If I turn the Fire HD sideways (landscape) can I increase text size so I dont have to scroll? Sometimes the pdf are images of scanned books, and I have to use OCR for the screen reader to recognize text for reading. Are there any apps that can perfrom this function? Thanks