In ConTeXt: how to change the hsize locally?

Question

In ConTeXt, I have text that is say 5cm wide. Once in a while I'd like to have a table or an image that sticks out of the right margin and is for example 10 cm wide. My idea is to have something like \startnarrower, just the opposite way. So what is the best approach to that? I have not specified my layout yet, so I am open to any clean solution.

Answer 1

I think that the details manual has lots of ideas on how to "bleed" an image to margins. Also see pack-box.mkiv for examples (search for bleed).

You can also use

\startnarrower[-left]
\stopnarrower

for text.

Answer 2

This is what I do now:

\setuplayout [
    backspace=2cm,
    width=10cm,
    height=20cm,
    rightmargin=10cm,
    ]

\showframe
\starttext

\definestartstop
  [big]
  [before={\setupnarrower[right=-4cm]\startnarrower[right]},
   after={\stopnarrower}]


\startbig
\externalfigure[cow][width=\localhsize]
\stopbig

\input tufte

\stoptext

It's exactly what I want. Thanks Aditya and Taco!