# What is \bfd in ConTeXt?

This is found fairly often in examples, but I found no explanation what `\bfd` actually is. It is never mentioned in the manual. So, what is it?

To answer your question, `\bfd` selects bold face in the font size corresponding to the factor `d`, by default d = 2.074.
You can look up all the default values for these factors in `font-pre.mkiv`.