If you use the raw attribute to mark up content as "raw beamer,"
as suggested earlier in this thread, it will not appear in
reveal.js output. Demo here:
https://pandoc.org/try/?text=%23+Introduction%0A%0A%60%60%60%7B%3Dbeamer%7D%0AHey+this+is+raw+beamer!%0A%60%60%60%0A%0A%23%23+Slide+one%0A%0Acontent%0A%0A%23%23%23+Vertical+slide%0A%0Acontent+vertical%0A&from=markdown&to=revealjs&standalone=0
Thomas Chevrier <tch...@gmail.com> writes:
> Hi folks,
>
> it's been exactly a year now and I am still not able to upgrade my version
> of Pandoc - stuck pre 2.7, because of the adverse change.
> Indeed, the "upgrade" for reveal.js users caused my latex beamer code to
> break down.
> I have tried multiple things without luck - I also tried a lua filter, but
> that did not work - no matter what, the content gets "slapped" onto a slide.
> As JGM suggests (was great watching him talk about Pandoc at TUG 2020
> keynote address), I'd love to be able to simply be able to have content
> escape being slapped onto a slide - I believe that's precisely the spirit
> of Beamer, which uses <mode> heavily for that purpose.
> I also thought that was the spirit of pandoc - as you were setting in the
> yaml header your level for displaying on slides, but i have been clearly
> proven wrong. :-(
> One option would be to recompile pandoc without that change, but because of
> the bloomberg API, I am forced to be on windows, which would make this
> solution cumbersome at best (would be straightforward on linux though).
>
> FYI, I posted back then on SO, got only 2 upvotes and 2 bookmarks, but no
> answer, not even a comment :-(
> https://stackoverflow.com/questions/57614387/pandoc-4317-forces-content-under-title-slides-to-be-included-in-a-frame-in-pand
>
>
> Could anyone *please* help me?
> many thanks in advance
> thomas
>
>
> On Wednesday, August 28, 2019 at 12:23:15 AM UTC+8 John MacFarlane wrote:
>
>>
>> To summarize the issue here, which concerns a change to slide
>> show formats:
>>
>> Prior to 2.7, versions of pandoc only put material under the "slide
>> level" headings on slides. If you set slide level to 2, then
>> only material under level-2 headings would appear on slides,
>> and text under level-1 headings would not appear at all
>> (though level-1 headings would create "title slides" with
>> just the section title).
>>
>> Reveal.js users consistently complained (#4317, #5237) that
>> this made it hard to structure reveal.js 2D slide shows, in
>> which it is common to have the "top" slide on each column
>> contain both a title and some text.
>>
>> In response, I changed pandoc in 2.7 -- as the changelog says,
>>
>> > Slide show formats behavior change: content under headers less
>> > than slide level is no longer ignored, but included in the title
>> > slide (for HTML slide shows) or in a slide after the title slide
>> > (for beamer). This change makes possible 2D reveal.js slideshows
>> > with content in the top slide on each stack (#4317, #5237).
>>
>> The change to reveal.js has been welcomed by reveal.js users,
>> but the change to beamer is apparently not welcome by everyone.
>> The reason I made the change to both formats is because I want
>> slide shows to work the same no matter what output format you
>> use. (So you can switch from beamer to reveal.js, for example,
>> and the slides will look more or less the same.)
>>
>> I had thought the beamer change was innocuous, since it could
>> be worked around by people who wanted to include content under
>> top-level section headings but not in the slides, e.g. by using
>> a filter to strip out this content.
>>
>> Unfortunately, Thomas Chevrier's use case can't be handled that
>> way. He wants to insert raw tex commands that (a) can't be
>> stripped out but (b) only work if they're outside the
>> 'frame' environment created for a slide. I can't think of any
>> workaround for this.
>>
>> One possible course of action would be to revert the beamer
>> change while keeping the reveal.js change. This would potentially
>> have two bad consequences:
>>
>> 1) slide shows would render differently (in content, not just
>> form) in reveal.js and beamer.
>>
>> 2) this may break slide shows that were constructed using the
>> new behavior since 2.7 was released.
>>
>> A less radical change might be to introduce special Div whose
>> contents get moved outside the slide itself. Anyway, comments
>> welcome.
>>
>>
>>
>
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