Thanks Aditya. Option 1 is simple enough. Not sure why that eluded me earlier! Option 2 gives me a little more choice, I think. I'd being playing with framed but could quite get it right. It does seem, though, just using '1' as the chapter number for the moment, that the underline is not quite centered; almost but not quite. So am playing around with the roffset to adjust that. Julian On 12/11/21 3:49 pm, Aditya Mahajan via ntg-context wrote:

On Fri, 12 Nov 2021, jbf via ntg-context wrote:

...

The following MWE deliberately shows two ways of getting a short rule beneath a chapter number, but neither achieve what I want. \underbar is too close to the number \setupbar[underbar][offset=-0.8] % play around with the number

...

and \crlf\blackrule too far below. So basically my question is: is there a way of adjusting the position of a brief rule beneath the number? \defineframed[underbarframed] [ frame=off, rulethickness=1pt, bottomframe=on, frameoffset=-1pt, % negative of rulethickness boffset=0.8ex, % play around with this ]

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In fact, in this instance, adjusting the roffset solved the problem, and I didn't see any marked change using the proportional tabular (monospaced?) fontfeature you suggest, though it is an interesting point to bear in mind in the future. I'd always thought of proportional versus tabular rather than proportional + tabular. Julian On 12/11/21 7:09 pm, Henning Hraban Ramm via ntg-context wrote:

\definefontfeature[ptabnum][default][ onum=no,pnum=yes,tnum=yes, ]

On 11/12/21 18:13, Henning Hraban Ramm via ntg-context wrote:

You’re right, tabular numbers are nonproportional. I meant versal (“normal”) numbers in opposite of oldstyle (mediaeval) numbers.

I think there are two mutually exclusive feature pairs that you're mixing up: lnum vs onum: lining numbers versus old style numbers; "lining" having no descenders, but sitting on the line. pnum vs tnum: proportional vs tabulate numbers. As the name suggests, the latter look better where numbers are vertically aligned because each numeral will take exactly the same space, so tables, but also footnotes etc. The former of course will look better in running text. Add to this that numbers can also be subscript or superscript. Some very extensive professional fonts have surprising combinations of these features, so in the end, one has to do what you did: fiddle with featuresets until the result looks right. Thomas