Bookmark Google Fonts and Font Squirrel. Next time an alert appears, don't just click "Continue" and accept mediocrity. Free download new fonts and take back control of your digital typography.

The warning is the core issue. Instead of preserving your chosen font, the software silently swaps it with a generic fallback (Arial, Times New Roman, etc.). This defeats the purpose of downloading new fonts.

Once installed, restart your document. The dreaded message— "font substitution will occur" —will disappear.