I guess you can always use a good old markup injection filter, like the one
attached.

Den tors 21 juli 2022 15:38William Lupton <wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org>
skrev:

> OK.
>
> Does that description imply that this only works for HTML output? If so
> then that's different from underline and small caps, which both say:
>
> This will work in all output formats that support XXX.
>
> On Thu, 21 Jul 2022 at 14:13, jmuc...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org <jmuccigr-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
>>
>> I took a stab at this. PR #8191.
>> On Thursday, 21 July 2022 at 08:58:55 UTC-4 Albert Krewinkel wrote:
>>
>>> William Lupton <wlu...-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org> writes:
>>>
>>> > Albert, is .mark documented in the manual? I didn't see it. Presumably
>>> > it could/should have a short section near the existing underline and
>>> > smallcaps sections. Tx, W.
>>>
>>> I believe the only mention is in the changelog of version 2.8:
>>>
>>> > Render a Span with class mark using the <mark> element (Florian
>>> > Beeres, #5797).
>>>
>>> You are probably right about having this documented, although the line
>>> between feature and implementation detail is a bit blurry here. Would
>>> you like to create a PR?
>>>
>>> --
>>> Albert Krewinkel
>>> GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124
>>>
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