Hi Mikael,
I did not think about using Metapost, I tried with the keys of the com= mand \framed without success.
I use the followin= g code for my headings (thank you Aditya) and I would like to use your code= instead.
Thank you.
= Fabrice

<= /span>

\setupbackgrounds
=C2=A0 =C2=A0 [header]
=C2=A0 =C2= =A0 [text]
=C2=A0 =C2=A0 [frame=3Doff,
=C2=A0 =C2=A0 =C2=A0topframe= =3Doff,
=C2=A0 =C2=A0 =C2=A0bottomframe=3Doff,
=C2=A0 =C2=A0 =C2=A0fr= amecolor=3D,
=C2=A0 =C2=A0 =C2=A0rulethickness=3D2pt]

=C2=A0 \def= ineframed
=C2=A0 =C2=A0 [headerframed]
=C2=A0 =C2=A0 [frame=3Doff,=C2=A0 =C2=A0 =C2=A0height=3Dfit,
=C2=A0 =C2=A0 =C2=A0width=3Dfit]
<= br>=C2=A0 \definecolor[ColorA][0.8(white)]
=C2=A0

=C2=A0 \starts= etups [headertext]

=C2=A0 =C2=A0 \setupheadertexts
=C2=A0 =C2=A0 = =C2=A0 [{\startframed [headerframed]
=C2=A0 =C2=A0 =C2=A0 [foregroundsty= le=3Dbold,background=3Dcolor,backgroundcolor=3DColorA]
=C2=A0 =C2=A0 =C2= =A0 \getvariable{headertext}{title} n\high{o}\,\getvariable{headertext}{num= ber}
=C2=A0 =C2=A0 =C2=A0 \stopframed}]

=C2=A0 =C2=A0 \setupheade= rtexts
=C2=A0 =C2=A0 =C2=A0 [{\startframed [headerframed]
=C2=A0 =C2= =A0 =C2=A0 [align=3Dflushleft,foregroundstyle=3D]
=C2=A0 =C2=A0 =C2=A0 = =C2=A0Lyc=C3=A9e LA SALLE, Lille\\
=C2=A0 =C2=A0 =C2=A0 =C2=A0\getvariab= le{headertext}{location}\space\endash\space Math=C3=A9matiques
=C2=A0 = =C2=A0 =C2=A0 =C2=A0\stopframed}]
=C2=A0 =C2=A0
=C2=A0 =C2=A0 =C2=A0= [{\startframed [headerframed]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 [align= =3Dflushright,foregroundstyle=3D]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 \da= te[d=3D\getvariable{headertext}{day},m=3D\getvariable{headertext}{month},y= =3D\getvariable{headertext}{year}]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 \s= topframed}]

=C2=A0 \stopsetups

=C2=A0 \setvariable{headertext= }{set}{\directsetup{headertext}}

\startuseMPgraphic{framewithshadow}=
path p;
p:=3Dorigin--(OverlayWidth,0)--(OverlayWidth,OverlayHeight)-= -(0,OverlayHeight)--cycle;
fill p shifted (2,-2);
fill p withcolor 0.= 8white;
draw p;
setbounds currentpicture to p;
\stopuseMPgraphic
\defineoverlay[framewithshadow][\useMPgraphic{framewithshadow}]
\starttext
\setvariables
=C2=A0 =C2=A0[headertext]
=C2=A0 =C2=A0= [title=3D{Devoir maison},
=C2=A0 =C2=A0 number=3D{6},
=C2=A0 =C2=A0 d= ay=3D{22},
=C2=A0 =C2=A0 month=3D{08},
=C2=A0 =C2=A0 year=3D{2019},=C2=A0 =C2=A0 location=3D{Seconde B},
=C2=A0 =C2=A0 time=3D{}]
\fra= med[background=3Dframewithshadow,offset=3D4bp]{\bf DM no 7 : D=C3=A9rivatio= n}
\stoptext

Le=C2=A0lun. 26 ao=C3=BBt 2019 =C3=A0=C2=A011:31, Mikae= l P. Sundqvist <mickep@gmail.com= > a =C3=A9crit=C2=A0:

On Mon, Aug 26, 2019 at 10:25 = AM Fabrice Couvreur <fabrice1.couvreur@gmail.com> wrote:
Hello,
How to make a frame with an offset shadow as the attached picture ? The text inside the fram= e is a variable.
Thank you.
Fabrice

___________________________________________________________________________= ________
If your question is of interest to others as well, please add an entry to t= he Wiki!

maillist : ntg-cont= ext@ntg.nl / http://www.ntg.nl/mailman/listinfo/nt= g-context
webpage=C2=A0 : http://www.pragma-ade.nl / http://context.aanhet.net=
archive=C2=A0 : https://bitbucket.org/phg/context-m= irror/commits/
wiki=C2=A0 =C2=A0 =C2=A0: http://contextgarden.net
___________________________________________________________________________= ________

Hi,

m= aybe something like this could work for you:

\startuseM= Pgraphic{framewithshadow}
path p;
p:=3Dorigin--(OverlayWidth,0)--(Ove= rlayWidth,OverlayHeight)--(0,OverlayHeight)--cycle;
fill p shifted (2,-2= );
fill p withcolor 0.7white;
draw p;
setbounds currentpicture to = p;
\stopuseMPgraphic

\defineoverlay[framewithshadow][\useMPgraphi= c{framewithshadow}]

\starttext
\framed[background=3Dframewithshad= ow,offset=3D4bp]{\bf DM no 7 : D=C3=A9rivation}
\stoptext

/Mikael=C2=A0
___________________________________________________________________________= ________
If your question is of interest to others as well, please add an entry to t= he Wiki!

maillist : ntg-cont= ext@ntg.nl / http://www.ntg.nl/mailman/listinfo/nt= g-context
webpage=C2=A0 : http://www.pragma-ade.nl / http://context.aanhet.net=
archive=C2=A0 : https://bitbucket.org/phg/context-m= irror/commits/
wiki=C2=A0 =C2=A0 =C2=A0: http://contextgarden.net
___________________________________________________________________________= ________