Font Substitution Will Occur Continue ((free)) — Download

To prevent it in the future for PDFs, ensure you check in Preferences (Ctrl+K) > Page Display . Microsoft Word (Mac):

The "Download Font Substitution Will Occur" message is a reminder that the document you're working with might not display or print exactly as intended. Understanding the implications and considering your options are crucial steps in ensuring that your document's final appearance meets your requirements. Download Font Substitution Will Occur Continue

It sounds like a tech-support riddle, but it’s actually your computer’s way of saying it doesn't recognize a specific font used in the file. To keep things readable, it wants to swap that missing font for a "close-enough" match. To prevent it in the future for PDFs,