Hi,

Not sure if I understand the problem correctly. You could try

\starttext
\startMPpage[offset=3pt]
  ahlength := 20;
  linejoin := mitered;
  drawarrow origin--(40,0) withpen pencircle scaled 5;
\stopMPpage

\startMPpage[offset=1cm]
  ahlength := 20;
  linejoin := mitered;
  drawarrow origin--(40,0) withpen pencircle scaled 5;
\stopMPpage
\stoptext

Compile with context.

/Mikael

On Fri, May 20, 2022 at 7:07 PM Bruce Horrocks via ntg-context
<ntg-context@ntg.nl> wrote:
>
> The arrow looks fine to me in ConTeXt ver: 2022.01.10 08:36 LMTX. (See 
> attached PDF)
>
> > On 20 May 2022, at 17:56, Vincent Hennebert via ntg-context 
> > <ntg-context@ntg.nl> wrote:
> >
> > Take the following MetaPost file:
> >
> > beginfig(0)
> >  ahlength := 20;
> >  linejoin := mitered;
> >  drawarrow origin--(40,0) withpen pencircle scaled 5;
> > endfig;
> >
> > Render it into PDF with ConTeXt. Witness the cut out ends of the arrow.
> > How to fix that?
> >
> > Being able to add some margin would be a solution, which may be
> > desirable anyway in some cases. Is that possible?
> >
> > Thanks,
> > Vincent
>
> —
> Bruce Horrocks
> Hampshire, UK
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