: Some printers allow you to "download" fonts to their memory for faster processing. If the memory is full or the font wasn't sent, substitution happens. You can often fix this by selecting "Download as Softfont" in your printer preferences. Unembedded PDF Fonts
If you are the one creating and sharing documents, prevent others from seeing the warning. Download Font Substitution Will Occur Continue
Specialized SHX fonts often contain industry-specific symbols (GDT, plumbing, electrical) that don't exist in standard fonts. : Some printers allow you to "download" fonts
Depending on your software, here are the most effective ways to resolve the issue: Download Font Substitution Will Occur Continue