Hi Wolfgang,

Pablo's solution works, but I tri= ed yours without success. Here are the main lines of my project

%%%% begin product<= /span>

\startproduct[terminale-manual]
=C2=A0
\p= roject[terminale-environment]

\startdocument
=C2=A0 =C2=A0
\s= tartfrontmatter
...

\stopfrontmatt= er
=C2=A0 =C2=A0
\startbodymatter
\component[terminale_recurrence= ]
...
\stopbodymatter
=C2=A0 =C2=A0
\stopdocument
=C2=A0 \stopproduct

%%%% end product

%%%% begin = project

\startproject[terminale-environme= nt]

\environment[terminale-style]
=C2=A0...=C2=A0
\stopproject<= /span>

%%%% end project

%%%% begin component

\project[terminale-environment]

\startcomponen= t[terminale_recurrence]

...=

\endcomponent

%%%% e= nd component

<= /div>

= %%%% begin environment

\star= tenvironment[terminale-style]

...<= /span>

\startsetups [section:chapter]
=C2=A0
\se= tuphead
=C2=A0 =C2=A0[chapter]
=C2=A0 =C2=A0[align=3Dflushright,
= =C2=A0 =C2=A0 textcommand=3D\groupedcommand{\blank[medium]}{},
=C2=A0 = =C2=A0 numbercolor=3Ddarkgray,
=C2=A0 =C2=A0 textstyle=3DChapterTextStyl= e,
=C2=A0 =C2=A0 numberstyle=3DChapterNumberStyle,
=C2=A0 =C2=A0 befo= re=3D\startChapterFrame,
=C2=A0 =C2=A0 after=3D\stopChapterFrame,
=C2= =A0 =C2=A0 header=3Dhigh]

\stopsetups

\startsectionblockenvir= onment [bodypart]
=C2=A0 =C2=A0 =C2=A0\directsetup{section:chapter}
\= stopsectionblockenvironment

\doifmode{*component}{\directsetup{secti= on:chapter}}

=C2=A0

...

\endenvironment=

%%%% end environment
=

Le=C2=A0dim. 15 ao=C3=BBt 2021 =C3=A0=C2=A019:03, Wolfgang Schuster v= ia ntg-context <ntg-context@ntg.nl= > a =C3=A9crit=C2=A0:

Pablo Rodriguez via ntg-context schrieb am 15.08.2021 um 18:33= :
> On 8/15/21 6:02 PM, Fabrice Couvreur via ntg-context wrote:
>> A small note : this method works if I compile the project but if I=
>> compile only one chapter, the header no longer appears.
> Hi Fabrice,
>
> I have never used projects and chapters (or whatever the right name is= ).
>
> I=E2=80=99m not sure I get what you=E2=80=99re experiencing: with a si= ngle chapter, do
> you have the fancy layout or not?
>
> It would make sense that the fancy chapter doesn=E2=80=99t appear only= compiling
> a chapter. I guess there is no \startbodymatter...\stopbodymatter
> wrapping it.
>
> Another approach would be:
>
> [...]

Setting values for \title is a way to avoid the chapter setup for the
table of contents etc.
but there is a way to set values which are used only when you process a component file.

To make it work one has to load the environment file after
\startcomponent because you
can use the *component mode to check whether the parent file is a
product or a component.

%%%% begin product
\startproduct [*]

\environment [...]

\startfrontmatter
...
\stopfrontmatter

\startbodymatter
\component [...]
\stopbodymatter

\stopproduct
%%%% end product

%%%% begin component
\startcomponent [*]

\environment [...]

...

\stopcomponent
%%%% end component

%%%% begin environment
\startenvironment [*]

\startsetups [section:chapter]

=C2=A0=C2=A0=C2=A0=C2=A0 \setuphead
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 [chapter]
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 [...]

\stopsetups

\startsectionblockenvironment [bodypart]
=C2=A0=C2=A0=C2=A0=C2=A0 \directsetup{section:chapter}
\stopsectionblockenvironment

\doifmode{*component}{\directsetup{section:chapter}}

\stopenvironment
%%%% end environment

Wolfgang

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