Note that Windows applications that do generate their own PDF, such as InDesign, Illustrator, and Photoshop do yield exact point sizes, primarily because they don't go through the Windows imaging model.Recently, a reader asked us how to copy and paste items into WordPress without causing formatting issues? Apparently, those values are “close enough for government work.” If it eases your mind at all, although we have heard about and have experience this issue ourselves over the years, we have never heard of a grant proposal or a government document submission (such as required by pharmaceutical companies to the FDA) to be rejected on the basis of 11pt text appearing in a PDF file as 10.98pt, 10.92pt, or 11.04pt. Unfortunately, there is nothing that Adobe can do about this. Furthermore, it you looked at the PostScript generated by the PostScript printer driver, the PCL generated by the PCL printer driver, or could even measure the type actually you would see that these applications are actually requesting these oddball point sizes and that is what you get for printed output. The same symptoms occur regardless of whether you produce PDF using the Adobe PDFMaker “save as Adobe PDF” function (part of Acrobat installed into Office applications), Microsoft's native “save as PDF,” or via print drivers including the Adobe PDF PostScript printer driver instance as well as third party print drivers that create PDF. The text you specify in your Office document (Word, Excel, PowerPoint, etc.) as 11 point type may appear as 10.98 point or 11.04 point in the resultant PDF file.
The issue of the resultant text size in PDF files being a small fraction of a point different from that specified in the application is due to how these Windows applications output either via print or the internal pathway used for creation of PDF with either Microsoft or Adobe tools. This is a problem that has plagued applications under Windows going back well over 20 years!
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