Hi,
I want to have the title of the chapters, sections and sub-sections in sans
serif Helvetica, body text and mathematics in Palatino.
Is this the right approach ?
Thanks,
Fabrice

\definetypeface [me] [rm]  [serif]    [palatino]   [default]
\definetypeface [me] [ss]   [sans]  [helvetica]  [default]
\definetypeface [me] [mm] [math]  [palatino]   [default]

\setupbodyfont[me,11pt]

\setuphead
  [chapter,section,subsection]
  [command=\ChapterCommand,
   textstyle=\ss,
   color=darkred]