First, just guessing but maybe if more adds a line there might also be a less parameter.
Anyway, this here works for me as well (adapted from Hans’s example, https://mailman.ntg.nl/archives/list/ntg-context@ntg.nl/message/6MRZEFJD5SGIQXJQQOENETERY5FKMG6S/):
\starttext
\startlinenumbering
\startparagraph
\input ward
Bla bla bla bla bla Bla.
\stopparagraph
\stoplinenumbering
\blank
\startlinenumbering
\startparagraph\looseness=+1
\input ward
Bla bla bla bla bla Bla.
\stopparagraph
\stoplinenumbering
\blank
\startlinenumbering
\startparagraph
\input ward
Bla bla bla bla bla Bla.
\looseness=+1\updateparagraphproperties\stopparagraph
\stoplinenumbering
\blank
\startlinenumbering
\startparagraph
\input ward
Bla bla bla bla bla Bla Bla.
\stopparagraph
\stoplinenumbering
\blank
\startlinenumbering
\startparagraph\looseness=-1
\input ward
Bla bla bla bla bla Bla.
\stopparagraph
\stoplinenumbering
\stoptext
Von: John Was <johnoxuk@gmail.com>
Gesendet: Mittwoch, 25. Juni 2025 12:34
An: mailing list for ConTeXt users <ntg-context@ntg.nl>
Betreff: [NTG-context] Re: Lengthening/shortening paragraphs
Hello Wolfgang
Thanks for that - I thought there would probably be a way of manipulating a paragraph through some other mechanism, and the temporary alignment setting does the job. (I'll investigate at some point how to do the reverse since sometimes one wants to lose a line, typically so that a footnote can be squeezed in.)
Best wishes
John Waś 🇪🇺 Слава Україні! 🇺🇦
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On Tue, 24 Jun 2025 at 16:50, Wolfgang Schuster <wolfgang.schuster.lists@gmail.com> wrote:
Am 24.06.2025 um 17:00 schrieb John Was:
> Hello. Is there a ConTeXt equivalent for plain TeX's \loosness (which
> allows the program to lengthening a paragraph, or shorten it if the
> number is negative). At the final stages of a book this is often useful
> for getting rid of unsightly gaps.
\showgrid
\starttext
\samplefile{zapf}
\page
\startalignment[normal,verytolerant,stretch,more]
\samplefile{zapf}
\stopalignment
\page
\startalignment[normal,verytolerant,stretch,2*more]
\samplefile{zapf}
\stopalignment
\stoptext
Wolfgang
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