\starttext \showframe
\dorecurse{6}{\chapter{Test Chapter #1}
Chapter \somestructureheadnumbersomeheadnumber[chapter][current] of \somestructureheadnumbersomeheadnumber[chapter][last]
\dorecurse{9}{\section{Test Section}
Section \somestructureheadnumbersomeheadnumber[section][current] of \somestructureheadnumbersomeheadnumber[section][last] \blank
\input tufte \par \input knuth \par
}