On Mon, 18 Apr 2022, Wolfgang Schuster via ntg-context wrote:

> Bruce Horrocks via ntg-context schrieb am 18.04.2022 um 22:46:
> > In the MWE below the 'part' title is centred but on one line only and,
> because it is a long title, the beginning and end are lost off the sides of
> the page.
> >
> > If it were a 'chapter' title then I could insert '\\' to cause a line break
> at that point. However this does not seem to work for 'part'.
> >
> > Is there a way of making 'part' titles wrap the same way that 'chapter'
> titles do?
> >
> > % ---begin---
> > \define[2]\placePartTitle{\midaligned{#2}}
> >
> > \definehead [Part] [part]
> > \setuphead[Part]
> >    [ placehead=yes,
> >      style={\tfd},
> >      command=\placePartTitle,
> >    ]
> 
> \setuphead
>    [Part]
>    [placehead=yes,
>     style=\tfd,
>     align=middle,
>     number=no]

Or use:

align={middle,broad},

which has slightly better alignment for titles, IMHO. There is also `alternative=middle`. 

Aditya