My sight is not what it was, and Arabic text is notoriously hard to read save in a fairly large font. I have downloaded various of the above, and can easily read the text in Skim or Preview using the zoom-feature. However, it would be easier for me to work from paper copies, if I could somehow increase the size of the type-face. I have assumed that the way of doing this is to convert the format to RTF, but I have tried the online-converters, and all have failed: either the text is jumbled, or it is displayed written from left-to-right or there is no text shown at all. Any help would be much appreciated.