Welcome to MobileRead, royallan!
I've been using a 505 for over a year now. I've encountered the small print problem once or twice with poorly formatted pdf files. What's the format of your document? Is there anything special (pictures, tables, charts, headers/footers) about the pages that won't enlarge?
As for your software question, I'll let some of the more knowledgeable members tackle that question.
Dreamer
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