\mainlanguage [en]
\setuppapersize[A4][A4]
-\setupbodyfont[10pt]
-%\usetypescript [lbr][ec]
-%\switchtotypeface [lbr] [10pt]
+% Define a custom typescript. We could also have put the \definetypeface's
+% directly in the script, without a typescript, but I guess this is more
+% elegant...
+\starttypescript[Custom]
+% This is a sans font that supports greek symbols
+\definetypeface [Custom] [ss] [sans] [iwona] [default]
+\definetypeface [Custom] [rm] [serif] [antykwa-torunska] [default]
+\definetypeface [Custom] [tt] [mono] [modern] [default]
+\definetypeface [Custom] [mm] [math] [modern] [default]
+\stoptypescript
+\usetypescript [Custom]
+
+% Use our custom typeface
+\switchtotypeface [Custom] [10pt]
% The function application operator, which expands to a space in math mode
\define[1]\expr{|#1|}