Am 05.02.2015 um 23:31 schrieb John Culleton <John@wexfordpress.com>:

On Thu, 05 Feb 2015 22:54:11 +0100
Hans Hagen <pragma@wxs.nl> wrote:

On 2/5/2015 9:38 PM, John Culleton wrote:

Client has an existing book that I am redoing
with many inserted square boxes of text
slightly protruding in the margin. Main text
wraps around each box. The line around each
such box has rounded corners. Is there an
example somewhere in the manuals or elsewhere?

\starttext

    \defineframed
      [whatever]
      [width=1cm,
       height=1cm,
       background=color,
       backgroundcolor=darkblue,
       foregroundcolor=white,
       forgroundstyle=bold]

    \dorecurse {100} {
        \starthanging{\whatever{#1}}
            \input tufte
        \stophanging
    }
\stoptext

And rounded corners?