I have Acrobat 9.5.1, and recently the text within the vast majority of documents I'm trying to display on screen, from a variety of different sources, just look awful.. as if it's substituting some 1980s pixellated non-scalable screen font. I've not had this problem before, since pdfs usually display pretty accurately and zoom nicely, so I can't believe that somehow suddenly I'm viewing lots of pdfs that are using non-standard fonts that aren't embedded. It's just ordinary stuff I'm viewing, like instruction manuals and so on.
Edit ->Preferences->Page Display
Change the option under Smooth Text Drop-down.
Generally re-launch is not required but you can surely try.
Hi there! is it working now? hope this helps: Could you have set the font to something small in your browser settings by mistake? If you are using Firefox, can you try selecting View → Zoom → Reset in the toolbar?
[Moderator's Note: Removing the web address]
Great answer. This works (as in setting Smooth Text under Preferences). Thanks. Not sure why one would ever not want smooth text, but never mind... thanks for helping out.