Am 17.08.2013 um 18:04 schrieb john Culleton :

How does one use a font name that contains an underline?

You can use the font as it is \starttext {\definedfont[file:FertigoPro_Italic.otf]Test} \stoptext or use the normalized form (lowercase and without the _) \starttext {\definedfont[file:fertigoproitalic]Test} \stoptext Wolfgang