But for the rest of the world, specifically China, Japan, and Korea (collectively known as the CJK region), 256 slots were a drop in the ocean.
: If the PDF was not "fully embedded," your computer won't know what these fonts are supposed to look like, leading to text displaying as dots or garbled characters. Substitution cidfont f1 f2 f3 f4 f5 f6 full
This system allows a single PDF to carry a CIDFont of type F1, and any printer or viewer with that same collection can correctly render the text, even if the exact font name differs (e.g., "Kozuka Gothic" vs. "Source Han Sans"). But for the rest of the world, specifically