Dear Hans and Wolfgang,

The following code generates a pdf that I cannot understand.

1. Although "placehead" is set to "no," the \part macro still makes an empty line.
2. The first \chapter does not open a new page, but if we switch the first \title
     and the first \chapter, the result seems to be all right.

Is there a simple fix?

Thanks in advance.

==================================
\setuphead
   [part,chapter,title,section]
   [continue=yes,page=yes,number=no]

\setuphead[part][placehead=no]


\showframe

\starttext

\input ward\page

\part{TITLE}\input ward\par
\title{Title}
\chapter{Title}
\chapter{Title}
\title{Title}
\chapter{Title}

\stoptext
==================================

ConTeXt minimal information:

zhichu  ~  context -version

mtx-context     | ConTeXt Process Management 0.63
mtx-context     |
mtx-context     | main context file:
/opt/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2016.03.26 13:51
  zhichu  ~  luatex -version
This is LuaTeX, Version beta-0.90.0 (TeX Live 2016)

Execute  'luatex --credits'  for credits and version details.

There is NO warranty. Redistribution of this software is covered by
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  zhichu  ~ 

-- 
Best regards,
ℤhichu ℂhen

Shanghai Institute of Applied Physics
No. 2019, Jialuo Road
Jiading, Shanghai, P.R.China
Tel: +86-21-39194888