However, Wolfgang, if I do, e.g.

\setuphead[chapter][textcommand={\setbar[underbar]}]

\starttext

\startchapter[title={My title}]

\input ward

\stopchapter

\stoptext

Then I do not get My Title with underline, which is what I want, and nor 
is anything else underlined in 'Ward'.

Could it be something to do with the version of LMTX? Mine is 2022.08.25 
19:21 LMTX.

I do have a workaround, with a \defineframed[underbarframed] and then 
setting offsets accordingly and using that as a textcommand.

Julian

On 21/9/23 14:26, Wolfgang Schuster wrote:
> jbf schrieb am 21.09.2023 um 05:03:
>>
>> Am attempting to get an underlined head style (chapter) with:
>>
>> \setuphead[chapter][textcommand=\underbar]
>>
>> But I get no underline. Am I doing something wrong? I can, of course, 
>> achieve the result at each chapter level with 
>> \startchapter[title={\underbar{text}}] but would prefer to achieve 
>> this with \setuphead
>>
>
> \setuphead[chapter][textcommand={\setbar[underbar]}]
>
> \starttext
>
> \chapter{\samplefile{ward}}
>
> \stoptext
>
> Wolfgang
>