Thank you Bastien. I tried but yes, you were right, it can leave large 
empty columns... not great. 

I think I will stick to a single column layout :-p 



Le vendredi 26 mars 2021 à 17:39:04 UTC, Bastien Dumont a écrit :

> \usepackage{supertabular}
> \newcommand\tcap{}
> \renewenvironment{longtable}{%
> \begin{onecolumn}
> \begin{center}
> \bottomcaption{\tcap}
> \begin{supertabular}%
> }{%
> \end{supertabular}
> \end{center}
> \end{onecolumn}
> \twocolumn{}% Otherwise it will not revert to two-columns layout.
> }
> \renewcommand{\endhead}{}
>
> However your text will resume at the page that begins after the end of 
> your table, possibly leaving a huge blank space in-between.
>
> Le Friday 26 March 2021 à 09:53:43AM, Loïc Houpert a écrit :
> > Thank you Julien and Bastien. I tried Bastien's solution : adding
> > ```
> > \renewenvironment{figure}{\begin{figure*}}{\end{figure*}}
> > ```
> > 
> > in a file include_header.tex that I am loading in pandoc with the option:
> > --include-in-header=" include_header .tex" \
> > 
> > and it works perfectly fine :-)
> > 
> > 
> > Now I tried to do the same with the table
> > \renewenvironment{table}{\begin{table*}}{\end{table*}}
> > 
> > But it doesn't change anything.
> > 
> > Currently, in my "include_header.tex" file, I also have these lines of 
> code to
> > fix the problem of table layout in twocolumns layout pdf:
> > 
> > \usepackage{supertabular}
> > \newcommand\tcap{}
> > \renewenvironment{longtable}{\begin{center}\bottomcaption{\tcap}\begin{
> > supertabular}}{\end{supertabular}\end{center}}
> > \renewcommand{\endhead}{}
> > 
> > 
> > Is there an easy way to adapt it so my table are also full-width?
> > 
> > Thank you,
> > 
> > Loïc
> > Le vendredi 26 mars 2021 à 16:07:43 UTC, Bastien Dumont a écrit :
> > 
> > Sorry for not having been clear enough: there is no difference between 
> (1)
> > and (2). Both interrupt the text stream on the middle of p. 2, balance 
> the
> > text between the columns, insert a blank space, then restart a new
> > two-columns stream. (3) with the "-M classoption=twocolumn" option would
> > result in something similar to the output of the following document, 
> which
> > doesn't produce such interruption in the text stream:
> > 
> > \documentclass[twocolumn]{article}
> > \usepackage{lipsum}
> > \renewenvironment{figure}{\begin{figure*}}{\end{figure*}}
> > 
> > \begin{document}
> > 
> > \lipsum[1-6]
> > 
> > \begin{figure}
> > \begin{quote}
> > \lipsum[8]
> > \end{quote}
> > \end{figure}
> > 
> > \lipsum[1-6]
> > 
> > \end{document}
> > 
> > I don't know if there is a way to place full-width figures in the middle 
> of
> > a page in a multicolumn document (that is, make the "h" option work). In
> > such cases, LaTeX defaults to top, the "p" option works if specified, and
> > you can make the "b" option work with \usepackage{nidanfloat}. If I 
> happen
> > to find anything useful, I will let you know on your repository.
> > (See here a recent synthesis on the topic: https://www.texfaq.org/
> > FAQ-2colfloat)
> > 
> > Best,
> > 
> > Bastien
> > 
> > Le Friday 26 March 2021 à 08:14:19AM, Julien Dutant a écrit :
> > > Thanks Bastien,
> > >
> > > Just to clarify: by "LaTeX always places on top of the page full-width
> > figures
> > > in a multicolumn environment" you mean that the figure is floated and
> > placed on
> > > top of a page, right? (as in the sample tex you give). Using neither 
> the
> > filter
> > > (i.e. removing the \end{multicols} and \begin{multicols}{2} that 
> surround
> > the
> > > figure) nor the \renenvironment crashes (floats not allowed in
> > multicols). But
> > > otherwise I don't see any difference in output between (1) filter 
> alone,
> > (2)
> > > filter + renewenvironnment, (3) renewenvironment alone, except that the
> > float
> > > may end up in a different page depending on details. I can see that 
> using
> > the
> > > renewenvironment alone may be simpler for Loïc's purposes than loading
> > the
> > > filter and wrapping the whole doc in ::: columns div. But perhaps a 
> more
> > > general solution would be:
> > >
> > > - to have a filter that handles float placement in LaTeX (per doc, per
> > figure
> > > basis).
> > > - to make sure the columns filter handles column markup when the doc is
> > in
> > > two-columns mode, without the need for a wrapping div.
> > > - possibly, to add float placement options in the columns filter?
> > >
> > > I'll post the last two issues on the columns repo.
> > >
> > > All best,
> > >
> > > Julien
> > >
> > > On Friday, March 26, 2021 at 2:49:48 PM UTC Bastien Dumont wrote:
> > >
> > > Hi,
> > >
> > > Thank you for sharing your filter, which is really great. I noticed one
> > > problem though: LaTeX always places on top of the page full-width 
> figures
> > > in a multicolumn environment. It means that the stream will be broken
> > after
> > > the figure, as this document will show:
> > >
> > > \documentclass{article}
> > > \usepackage{multicol}
> > > \usepackage{lipsum}
> > >
> > > \begin{document}
> > >
> > > \begin{multicols}{2}
> > > \lipsum[1-7]
> > > \end{multicols}
> > >
> > > \begin{figure}
> > > \begin{quote}
> > > \lipsum[8]
> > > \end{quote}
> > > \end{figure}
> > >
> > > \begin{multicols}{2}
> > > \lipsum[1-7]
> > > \end{multicols}
> > >
> > > \end{document}
> > >
> > > If you only want to make all figures span the entire width in a
> > two-column
> > > layout, you can simply add this in the metadata block of your document
> > > (without changing anything in the command-line):
> > >
> > > header-includes: |
> > > \renewenvironment{figure}{\begin{figure*}}{\end{figure*}}
> > >
> > > However, the limitation regarding the figures' placement will still
> > apply.
> > >
> > > Hoping that it helps,
> > >
> > > Bastien
> > >
> > > Le Friday 26 March 2021 à 06:34:51AM, Julien Dutant a écrit :
> > > > Hi,
> > > >
> > > > The columns filter might help: https://github.com/jdutant/columns . 
> It
> > > will
> > > > typeset as full width anything wrap within a ::: columns-span DIV. It
> > > doesn't
> > > > have an option to automatically do that for every figure / table,
> > though
> > > you
> > > > could write a small lua filter to add that. Notes:
> > > >
> > > > - the column-span DIVs will only be processed if they are in a :::
> > > columns DIV.
> > > > Solution: put the entire document in such a DIV (or ::: 
> {.two-columns},
> > > to be
> > > > on the safe side)
> > > > - the filter will add "\usepackage{multicols}" to your header.
> > > >
> > > > A small Lua filter to put tables in fulll width would like:
> > > >
> > > > ```lua
> > > > function Table (elem)
> > > > return pandoc.Div( elem, {class = 'column-span' } )
> > > > end
> > > > ```
> > > >
> > > > Best,
> > > > J
> > > >
> > > > On Friday, March 26, 2021 at 12:33:15 PM UTC houpe...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org 
> wrote:
> > > >
> > > > Hi all,
> > > > I didn't find a way to easily display my figure in full width in a
> > > > two-column layout document.
> > > >
> > > > I have a markdown document that I convert to pdf with the command
> > below:
> > > >
> > > > pandoc article.md \
> > > > --citeproc \
> > > > --from=markdown+tex_math_single_backslash+tex_math_dollars+raw_tex \
> > > > --to=latex \
> > > > --output=build/article-print-doublecols.pdf \
> > > > --pdf-engine=xelatex \
> > > > --include-in-header="layout/supertabular.tex" \
> > > > --filter="layout/twocolumns_table_fix.py" \
> > > > -M classoption=twocolumn
> > > > -M geometry="left=3cm,right=3cm,top=2cm,bottom=2cm"
> > > >
> > > >
> > > > Is there an "easy" way to do that so the figures in my pdf will be 
> full
> > > > width while all the rest of the document stay in a twocolumns layout 
> ?
> > > > (e,g. by adding a specific argument to this command ?)
> > > >
> > > > I didn't find an easy solution to this problem....
> > > >
> > > > Thank you,
> > > >
> > > > Loïc
> > > >
> > > >
> > > >
> > > >
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