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==Official modulesProducing Your Presentations with ConTeXt ==

Waiting After using ConTeXt for someone a while, many users begin to write something think about them .producingtheir presentations with it, too.ConTeXt is ideally suited for thistask. Here's just a very selective list of the advantages you gain:

* The superior typographic quality of TeX and ConTeXt will be available for your presentations.Users doing scientific presentations will also appreciate the well-known mathematical abilities TeX offers..* [[RawSteps]] module

*In addition, ConTeXt has great graphics abilities (placing images and floats) and can make excellent use of color. *Moreover, you can use all of the advanced features of ConTeXt, such as interaction or integration of metafun code. *The material of your presentations can be reused for handouts, papers, notes, etc. If you make use of the [[Modes]] feature, you can even recompile your entire presentation in a different format without changing a single line in your source.  As you probably know, ConTeXt produces pdf-output by default; that's a greatadvantage when you're thinking about a presentation: you can simply produce apdf-file and open it with a viewer such as xpdf or Acrobat Reader and show thepages in fullscreen mode. This is especially appealing when you want todistribute your presentations via mail or the web or when you have to show themon equipment you don't know: while proprietary software may or may not beavailable, you can usually be certain that everyone has an application fordisplaying pdf-files. This section of the wiki wants to get you started with presentations inConTeXt. There's lots of amazing stuff in the distribution already, such astruly amazing [[Presentation Styles|prebuilt styles]] for presentations which you can simply use by typing, e.g. <texcode>\usemodule[pre-original]</texcode> The styles are fully documented, and you can learn amazing tricks by looking atthe source and the documentation. However, for beginners, it might be easier tostart with a very basic presentation and then slowly add more fancy stuff. Thissection is thus targeted at newcomers; more experienced users may want to skipthe first sections. This document deals with presentations that will be shownwith the help of a digital projector, but many elements will be applicable tointeractive screen presentations as well. Many information are included in this [http://www.tug.org/pracjourn/2006-2/schmitz/schmitz.pdf article] by Thomas. == Your First Presentation ==  The first thing you will need to do is adapt the papersize: you need a paperlayout in landscape mode that fits a computer screen. (Actually, this layout issmaller than a screen, but a pdf-document can be scaled without losingquality.)  === Setting screen dimensions === <texcode>\setuppapersize[S6][S6]</texcode>will set the proper document ratio (3:2) to fit the computer screen. And you probably do not want any page numbers on your slides: <texcode>\setuppagenumbering[state=stop]</texcode> === Setting the tolerance === Moreover, on slides, you want TeX to be tolerant with its horizontal space(since you will normally be typesetting not entire paragraphs, but single linesonly, this shouldn't be a problem): <texcode>\setuptolerance[verytolerant,stretch] </texcode> === Full-screen mode === <texcode>\setupinteractionscreen[option=max]</texcode>will cause launcing the PDF document in full-screen mode. In Acrobat you can use CTRL-L to switch between normal and full-screen mode. === Hyperlinks, buttons & navigation === {{todo|write something about them}} Here is a small example showing how to include hyperlinks: <texcode>\setupcolors[state=start]\setupinteraction[state=start,color=middlered]\useURL [garden][http://contextgarden.net]\starttextThe \from[garden] site is useful.\stoptext</texcode> It looks like this (in a PDF viewer the red link is clickable and should call up a browser on the link when you click it): <context>\setupcolors[state=start]\setupinteraction[state=start,color=middlered]\useURL [garden][http://contextgarden.net]\starttextThe \from[garden] site is useful.\stoptext</context> If you want an alternative text to show up in the clickable area, use the fourth argument to \useURL, like this:<texcode>\setupcolors[state=start]\setupinteraction[state=start,color=middlered]\useURL [garden][http://contextgarden.net][][Context garden]\starttextThe \from[garden] is useful.\stoptext</texcode> It looks like this: <context>\setupcolors[state=start]\setupinteraction[state=start,color=middlered]\useURL [garden][http://contextgarden.net][][Context garden]\starttext The \from[garden] is useful.\stoptext</context> The same technique can be used to add navigation buttons. [[Symbols/nav]] provides the symbol. <texcode>\def\fp{\goto{\symbol[firstpage]}[page(1)]}\setupheadertexts[\fp]</texcode> We can also add the button to the footer with [[Command/setupfootertexts]]. <context>\setupcolors[state=start]\setupinteraction[state=start]\def\fp{\goto{\symbol[firstpage]}[page(1)]}\setupheadertexts[\fp]\starttextLorem ipsum dolor sit amet.\stoptext</context> === Including Graphics === Everything works just the same way as graphics in usual documents. But if a presentation is your first document, let's repeat it once more here: <texcode>\externalfigure[name][width=...]%% (probably surrounded by \placefigure)</texcode> === Graphics with Metafun === {{todo|how to make page-dependant graphics}} === Animation === See [[Animation]] (page is still under construction). === Compiling Your First Presentation === If you compile a document with these settings, you have something that youcould show as a presentation slide: <texcode>\setuppapersize[S6][S6]\setuppagenumbering[state=stop]\setuptolerance[verytolerant,stretch]  \starttext Here's my first presentation in \CONTEXT! Isn't it amazing? \stoptext </texcode> == Refining the Presentation ==  OK, this is not too impressive yet. The first thing you will want to do isadapt the font size. With a paper size of S6, I find a font size of 20pt aboutright: <texcode>\switchtobodyfont[modern,20pt]</texcode> This looks better.  === Colors === Next up: colors. Now I'm aware that the use of colors is an immensely personalchoice -- I've seen people present their slides with a dark gray font on alight gray background, and they seemed very proud of their design. Others usepsychedelic colors that can induce serious sickness. So let's go for a ratherconservative combination of colors. Something I find very readable even inrooms where the lighting is a bit problematic is a white typeface on a bluebackground. So let's add this. Our document will now look like this: <texcode>\setuppapersize[S6][S6]\setuppagenumbering[state=stop]\switchtobodyfont[modern,20pt]\setupcolors[state=start]\setupbackgrounds[page][background=color,backgroundcolor=darkblue]\startcolor[white] \starttext Here's my first presentation in \CONTEXT! Isn't it amazing? \stoptext</texcode> This will give you something to start from. You can now go and build apresentation with this design: make every slide a new page, use all the ConTeXtfeatures (such as lists, itemize, tables, math, chemical formulae, etc.) youwant. === Adding fancier effects === Now when you look at your slides, you will certainly feel that there's room forimprovement. There's only a few things I can mention here; for the rest, have alook at the predefined styles to get some ideas. First, the background. Something I find very attractive is a background thathas different shades, beginning in a very dark blue at the top and ending in anoticeably lighter blue at the bottom. Metafun can easily produce such shadedbackgrounds: <texcode>\definecolor[a][r=0,g=0,b=1]\definecolor[b][r=0,g=0,b=0.05] \startuniqueMPgraphic{LinearShade}path p ;p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;linear_shade(p,6,\MPcolor{a},\MPcolor{b}) ;\stopuniqueMPgraphic \defineoverlay[shaded][\useMPgraphic{LinearShade}] \setupbackgrounds[page][background={shaded}]</texcode> What we have done: defined two colors; a is a very light, b a very dark blue.We let metafun calculate an interpolation between both colors. Try other valuesfor the colors and be amazed! You can also try to set "p,6" to other valuessuch as "p,0" or "p,4."  === Adding a Footer === Next, the bottom of our slides. If the audience is apt to forget your name, thetitle of your talk, and the date, you could include this vital information inthe footer of the page.  <texcode>\setupfootertexts[{\color[white]{\tfxx \midaligned{\rlap{\currentdate} \hfill TITLE HERE\hfill \llap{YOUR NAME HERE}}}}]</texcode>Don't forget to put<texcode>\setupfooter[state=start]</texcode>into your document where you want the footer to appear first (probably not onthe title of your presentation...). === Adding a Progress Meter === If your audience is able to remember these details, but you suspect they maybe yearning for the end of your presentation, you may want to include a"progress meter" that highlights how many slides they have seen and how manymore they will have to stand. Put this in your preamble: <texcode>\definecolor [InteractionColor] [s=.2]\definecolor [ContrastColor] [s=.5] \setupinteraction [page=yes, color=InteractionColor, contrastcolor=ContrastColor, menu=on, state=start] \setupsubpagenumber [way=bytext, state=start] \setuplayout[bottomspace=.8cm, bottom=12pt] \startinteractionmenu[bottom] {\interactionbar[alternative=f,width=\makeupwidth,height=1ex]}\stopinteractionmenu</texcode>Again, don't forget to put <texcode>\setupinteractionmenu[state=start]</texcode>into your text. Finally, a few things about the placement of pictures. This can be done withthe {{cmd|framed}} command. You probably have to try and adjustdifferent parameters to get exactly what you need, but here's something thatworked for me: === Adding Pictures === In the case of wide pictures, it's fairly easy. You will want them midaligned,and you'll want them to fill as much space of the area between your title andthe footer as possible: <texcode>\midaligned{\externalfigure[NAME][height=.75\textheight]} %Adjust!\vfill</texcode> I found it more difficult to have longish narrow pictures: in that case, Idon't want a title above the picture, but I want it to fill all the verticalspace between the top margin and the footer. I want the text accompanying thepicture opposite it, centered horizontally and vertically. This can be donewith a {{cmd|startcombination}}: <texcode>\setupcombinations[distance=0pt] \setupframed[frame=off,height=.9\textheight,width=.5\textwidth,top=\vss,bottom=\vss,align=middle] \startcombination\framed{\externalfigure[NAME][width=.5\textwidth]}{} %watch the pair of empty braces,\framed{YOUR TEXT GOES HERE}{} % it's essential\stopcombination</texcode>  == Post Processing Presentation == Sometimes one wants to give a handout of the presentation, with multiple slides on one page. It is easy to do this using <cmd>combinepages</cmd> or <code>texexec --pdfcombine</code> To use <cmd>combinepages</cmd>, suppose that your presentation is <code>slides.tex</code>. Create a file <code>handout.tex</code> with the following content <texcode>\setuppapersize [A4][A4] % or [A4,landscape][A4,landscape] \setuplayout [header=0pt,footer=1cm, backspace=1cm,topspace=1cm, width=middle,height=middle] \setupfootertexts [presentation---\currentdate\space---\space\pagenumber] \starttext \combinepages[slides][nx=2,ny=3,frame=on]\stoptext</texcode>This will give you 2*3 slides on A4 paper. == Additional modules == * The [[RawSteps]] module enables you to build a presentation step-by-step without the usage of JavaScript* The simple slides module [http://github.com/adityam/simple-slides/tree/master simple-slides] serves too. == Examples of presentations == See also [[Sample documents]] If you're interested in presentations, your first stop should be the [http://www.pragma-ade.com/ pragma website]. You can download pdfs with the documented source-code of 18 presentation modules at http://www.pragma-ade.com/dir/general/sources/. To get a first impression of the visual appearance that the prebuilt styles offer, have a look at http://www.pragma-ade.com/show-pre.pdf (big document, ~ 3 MB!). {{todo|collect some + some extremely simple}} * '''Introduction to ConTeXt''' (in French) by Denis Roegel at Gutenberg meeting in 2002 [http://www.gutenberg.eu.org/manifestations/92-supports-29mai2002.html] ([http://www.loria.fr/~roegel/TeX/context-gut2002.tex tex], [http://www.loria.fr/~roegel/TeX/context-gut2002.pdf pdf]). * [https://github.com/adityam/context-slides-example Slides example] by Aditya Mahajan ==Some Ideas==

** This third output would also allow to print a ''"slide + comment"'' version of the presentation for the speackerspeaker.

* In general, I seem to have much more luck with advi then with xdvi for doing slides. It supports all kinds of interactive things. I've been told it can even do plugins (movies and such), but they only have a LaTeX package to support that. ===Working Example (for the ones not satisfied with \presentationstep)===

[[http://archive.contextgarden.net/message/20041103.083500.43ac3121.html]]. David Munger also derived an alternative [[http://archive.contextgarden.net/message/20041106.080646.2544e4f3.html]] from Otared Kavian's work.Bateni has ported that work to MkiV [[https://github.com/bateni/rawsteps-mkiv]] [[Category:ConTeXt-Issues]]