Originally Posted by Bronzato
...When I transfer this pdf to my reader (SONY PRS-T1), the fonts are tiny ...
... because you setup the document in Word inappropriately.
As HarryT said, PDF is a poor choice when producing documents to be read on ereaders. Some ereaders can do some "tricks" to help matters, but in general PDFs must be created for a specific display size, screen or paper. A PDF formatted for a letter sized piece of paper, the normal defaults
in Word and PrimoPDF, just won't be readable on a small screen.
If you want to keep your MS Word > PDF via PrimoPDF workflow you must choose an appropriate page size, appropriate font sizes, and appropriate margin widths if you want decent results. Even then, the resulting PDF will display well on only one size reader.
There is an infinite variety of actual sizes that will work. What's critical is how they relate to each other. These sizes should work:
page size: 3"w x 4"h or 3.5"w x 4.75"h
margins: 1/8"-1/4" on all sides (left, right, top. & bottom)
minimum text size: 10pt. (you might get by with 8pt)
Using those dimensions and a properly configured PrimoPDF you should get a PDF that is readable on most 6" ereaders.
If you use a larger page size you must use a proportionally larger text size. With letter size paper you might get decent results if you use 1/2" margins and a 24-30pt minimum