[wallcraft]

Originally Posted by jackie_w

I'm assuming you mean using font embedding.

You can use custom fonts without embedding them (i.e. without including them in the ePub). See ePub custom Fonts on 700, 505, 300, 600. The simplest approach is to use an add-on to the CSS such as:

@font-face {
  font-family: "Arial Black", serif, sans-serif;
  font-weight: normal;
  font-style:  normal;
  src: url(res:///Data/fonts/Arial-Black.ttf);
}

Where fonts is a directory on your internal memory containing the fonts you want to use. This is a simple example, which renames the default fonts, and you can do a lot more with fonts that this.