On Mon, 30 Jan 2012, Marco wrote:

> On 2012-01-30 Wolfgang Schuster <schuster.wolfgang@googlemail.com> wrote:
>
>> The  ConTeXt  package  is  huge and  provides  dozen  of
>> commands but  I guess  many have *one*  favorite command
>> (maybe also functionality).
>
> I was surprised  by the unusual “Subject” line  in my mail
> client. But I don't hesitate:
>
> My  favourite  command  is  \externalfigure  [placeholder]
> because it  produces very  pretty colourful  graphics (I'm
> bored to use the dutch cow or the wind mill every time).
>
> Example:
>
> \useMPlibrary [dum]
> \starttext
>
> \dorecurse{10}{
> 	\startTEXpage
> 		\externalfigure [placeholder]
> 	\stopTEXpage}
>
> \stoptext

You can also use my `\externalkitten` macro: 
http://randomdeterminism.wordpress.com/2011/05/07/images-for-documentation-examples/

\def\externalkitten[#1]%
     {\getparameters[kitten][width=10pt, height=10pt, #1]
      \externalfigure
         [\ctxlua{context("http://placekitten.com/g/\%0.0f/\%0.0f",
                   \withoutpt{\the\dimexpr\kittenwidth},
                   \withoutpt{\the\dimexpr\kittenheight})}]
         [#1, method=jpg]}

\starttext
\placefigure[left,none]{}
     {\externalkitten[width=0.5\textwidth, height=0.3\textheight]}
   \input knuth
\stoptext

Aditya