Am Montag, 30. September 2024, 05:58:10 MESZ schrieb ai2472206007@yeah.net:
> I'm not sure I understand your needs. 
> But if you don't want a background, but just need a border. 
> You can try command “startsidebar“ :
> https://wiki.contextgarden.net/Command/setupsidebar

Thank you for that command, it is pretty much that what I want.
In contrast to a textbackground, it seems to be always in the margin of the page.

I tried:
```
\definesidebar[excursussb][
	rulethickness=1mm,
	rulecolor=darkred,
	distance=1mm, % <- this seems to be not respected for text that is narrower
]

\definedescription[excursus][
	text={Excursus:\ },
	alternative=top,
	headstyle=bold,
	width=broad,
	before={\startnarrower\startsidebar[exkursussb]},
	after={\stopsidebar\stopnarrower},
]
```

The more relevant problem, however, is that it does not work with footnotes.
I got exactly the same problems like with textbackground (see the stackexchange post for screenshots).

Gerion