The answer to this question turns out to be fairly simple, I'm afraid.
The key to this is that you can see the Perpetua font in the font drop-down list in Microsoft Word and that you are running Microsoft Office on MacOS.
Whereas installation of Microsoft Office on Windows actually installs the Perpetua font family in the Windows Fonts directory, under MacOS, Microsoft Office does not install the Perpetua font family in such a way that it is available to applications other than the MacOS Microsoft Office applications themselves. The fonts are actually “hidden” inside the executable files for Word, Excel, and PowerPoint and are not visible to other applications, including Adobe Acrobat (or any other Adobe applications). Thus, you cannot edit text formatted in any of the Perpetua fonts in a PDF file since Acrobat requires the font to be installed on your system in order to do editing.
To get around this problem, you would need to separately license the Perpetua font(s) (a font family from Monotype) that you need and install them into your system's font directory. Sorry, but Adobe can't assist with this!
All that having been said, be aware that in the general case, Acrobat's text editing ability is fairly simplistic. It doesn't support advanced typographical features (including ligatures and advanced OpenType features) or even simple either horizontally-only or vertically-only scaled text. And it certainly cannot handle page breaks, repagination, etc. Once you go beyond simple “text touch-up” functions, you are much better off going back to your original word processor or document layout program for editing text.
- Dov
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