\setupbodyfont[dejavu]

\starttext

\setupnotes[textstyle=\tx]

\setuphead[chapter][style=\bfd]

\chapter{Testing a chapter\footnote{Actually for testing footnotes in a chapter header\dots}}
\section{Testing a chapter\footnote{Actually for testing footnotes in a chapter header\dots}}
\section{Testing a chapter\footnote{Actually for testing footnotes in a chapter header\dots}}

{\bfd test \tx test \high{test} \txx test \high{test}}

\stoptext
