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A fix for jagged fonts in PDFs exported from Pages Apps
We use Pages to create a lot of our product information, and ran into an issue whilst creating PDFs: On two of our marketing Macs, using the Export to PDF feature would result in certain fonts appearing pixelated when viewed in Preview. They looked fine, however, in Acrobat Reader. Even more mysteriously, the same export worked flawlessly on another Mac. Both of the fonts were both smaller than 8pt.

It turns out that the setting under System Preferences » Appearances that sets the smallest font size to be aliased on-screen also influences PDF creation (which makes sense, as OS X renders everything on-screen as a PDF, I think).

So if your PDFs have fonts that aren't aliased, simply lower the font smoothing setting when you create the PDF, and the problem will be avoided. You can then raise the threshold again afterwards; the PDFs will still look fine.
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A fix for jagged fonts in PDFs exported from Pages | 2 comments | Create New Account
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Anti-aliased
Authored by: SOX on Apr 04, '07 09:42:57AM

s/alias/anti-alias/gi

I think this is what you meant. No one wants font aliasing

(which is a technical term borrowed from the language of periodic fourier transforms, meaning when one undersamples a pattern the high frequencies appear as false low frequencies. In fonts this means that if you display an object made at one resolution at a different non-integer multiple resolution, the spots get moved around some making it look ugly. Anti-aliasing is a way to remove this artifact by filtering the spectrum, which is the same as blurring the font a bit to make it display better)



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Re: Anti-aliased
Authored by: Clint MacDonald on Apr 04, '07 01:32:53PM
Anti-aliasing is a way to remove this artifact by filtering the spectrum, which is the same as blurring the font a bit to make it display better
Really? I never knew that! Thanks for the excellent explanation of the term "anti-aliasing." (Okay, I didn't exactly understand the explanation, but at least one was offered!)

Best wishes,
Clint



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