I have a Kindle Touch (Kindle (7th Generation)). I have converted a PDF into
.MOBI format using PDF converter tools, such as
kdpdfopt with all these options set:
-mode fp -n- -c -ocr t -h 6.7in -w 4.7in. And then, for smooth rendering, I converted this PDF into
.MOBI using Calibre.
Now when I transferred this converted
.MOBI file onto my Kindle, the font size remained the same. Even if I try to zoom in, the font size remains constant.
P.S. The font size is set very small which makes reading very poor.