\setupheadertexts
  [pagenumber]

\setupfootertexts
  [chapter]

\definetext 
  [start of chapter]
  [footer]
  [pagenumber]

\setuphead
  [chapter]
  [footer=start of chapter,
   header=empty]

\starttext 

\chapter {This or That}

\section {Such or so}

Imagine that we want to show the title of the chapter in the
footer and the pageumber in the header. At the first page of
a chapter, this would mean that the title is shown twice,
which does not look that good. When we also want the
pagenumber not to show up on top of every page we have to
set up the header and footer in such a way that the first
page of a chapter is treated differently. 

\page 

This sample shows an application of logical running heads. We
set up the header and footer texts to show the pagenumber and
chapter title. One can use the name of a sectioning command 
as keyword. 

\chapter {Here or there}

\section {Yes or no}

We can temporary change the status of the header and footer 
of a page where a sectioning command occurs. Here we only 
need to set the chapter related values. 

\page 

We simply switch of the header. When we had said \type
{high}, the title would have been moved up. The footer is 
assigned a logical name of the alternative footer text. This 
alternative is defined by \type {\definetext}, where the 
second argument specifies the location. 

This is typically a feature that can go unnoticed for a long 
time, unless desperately needed. 

\stoptext 
