If you are the creator, you can stop this warning for others by "embedding" the fonts directly into the PDF.
: Use the PURGE command in AutoCAD to remove any unused text styles that might be triggering the substitution warning. Download Font Substitution Will Occur
This message is most commonly associated with three environments: If you are the creator, you can stop
If you're seeing the message, don't panic! It’s just your computer's way of saying it’s missing a specific font used in your document and is swapping it with a "close enough" match. If you are the creator