This is a template for slides using the Shower JavaScript framework (version 3.2) with a W3C style. For usage instructions, see at the end.

To start the slide show, turn on JavaScript and press Shift+F5 (or Command+Enter on Mac) or click on a slide. Return to the index by pressing the Esc key.

The W3C slide style

… for the Shower framework

Bert Bos

Lists

An example of a numbered list:

  1. Potatoes
  2. Onions and olives

An example of an unordered list:

Some elements

Words can be given a strong emphasis, which makes them appear in bold

The normal emphasis has a highlighter effect.

Code looks like this: if (a) return b;

This link goes to slide 2

This is an example of a note, in a smaller font

Incremental display

An image on the side

[Picture of a stylized tree with colorful, square leaves]

It seems the famous ‘lorem ipsum’ is based on a text by Cicero, but with the lines mixed up. On a Cicero by the text, it seems the ‘ipsum lorem’ is famous based with lines but mixed up.

An image on the side

[Picture of a stylized tree with colorful, square leaves]

And again, with class slide side right.

It seems the famous ‘lorem ipsum’ is based on a text by Cicero, but with the lines mixed up. On a Cicero by the text, it seems the ‘ipsum lorem’ is famous based with lines but mixed up.

A big image on the side

[Picture of a stylized tree with colorful, square leaves]

It seems the famous ‘lorem ipsum’ is based on a text by Cicero, but with the lines mixed up. On a Cicero by the text, it seems the ‘ipsum lorem’ is famous based with lines but mixed up.

A big image on the side

[Picture of a stylized tree with colorful, square leaves]

And again, with class ‘slide side right big’.

It seems the famous ‘lorem ipsum’ is based on a text by Cicero, but with the lines mixed up. On a Cicero by the text, it seems the ‘ipsum lorem’ is famous based with lines but mixed up.

In columns

Title

Children of an element with a class of columns are distributed over two columns

Title

This is the second child, which goes into the right column

Title

And this is the third one. Left column again.

Etc.

place t l
place t
place t r
Here is something for the left side, with class place l
class place puts an element centered in a 3×3 grid
place r
place b l
place b
combine place with top (or t), right (or r), bottom (or b) and left (or l)

Numbered lines of code

Lines in a PRE can be numbered
                       (automatically)
  * Give the PRE a class of "numbered"
  * Works for up to 20 lines
                       (depending on font size)
  six
   seven
   eight
    nine
    ten
  eleven

Striped tables

row 1has no background
row 2has a light gray background
row 3has no background
row 4has a light gray background
etc.
etc.

Image overlay: cover

A bridge over the Rhone in Lyon

Careful, some images make the text hard to read!

Image overlay: fit

A bridge over the Rhone in Lyon

Careful, some images make the text hard to read!

White text

[photo with a beach, cliffs, buildings, dark clouds and a surfer]

(Photo ‘Surfer and the stormy sea’ by Xavier Nohet)

Shout and grow!

Shout:

Takahashi method!

Shout & Grow:

Animated

Grow: Don't use this too often!

Slide transitions

The style sheet predefines several transitions: fade-in, slide-in, move-left, etc.

A transition can be set globally, applying to all slides; or locally, applying only to the transition between this slide and the next.

Convert to PDF

Print in portrait mode to get:

  • multiple slides per page
  • notes between the slides

📃︎ Try it! [W3C team only]

A4 or Letter

Print in landscape mode to get:

  • one slide = one page
  • no notes

📃︎ Try it [W3C team only]

PDF slides

Conclusion

  1. Making slides is easy
  2. Questions?

User manual

This is a template for slides using the Shower framework (version 3.2) with a W3C style. The Shower JavaScript code manages the slide progression, while the style sheet provides the W3C look and some useful predefined layout styles.

If you write slides with this style, you can either put them online or download a zip with everything needed to present offline, as explained below.

Note: The same slides and the same style can also be used with the b6+ framework. Look in the HTML source for how to change the script.

Developing slides online

If you develop your slides on the W3C web site (with HTTP PUT, WebDav or CVS), then make a directory under https://www.w3.org/Talks/2021/ or https://www.w3.org/2021/Talks/ (or whatever the current year is). The former will be public, the latter requires setting an ACL. Copy shower3-2.html (this file) from https://www.w3.org/Talks/Tools/ into your directory and edit the content, or just use it as an example.

Developing slides offline

If you develop your slides offline (or plan to present them without a network), then download this zip file. Unpacking it creates the following directories and files:

Make a directory for your own slides under slides. (A good name is MMDD-Theme, where MM is the month in which you give the talk, DD the date and Theme the topic, e.g., ‘Legal’, ‘W3C’ or ‘SVG’.) You can copy the shower3.html file there as a starting point, or just use it as an example. If you make any images, put them in that directory as well.

If you are able to upload your slides, put your directory with all that it contains under https://www.w3.org/Talks/2021/ or https://www.w3.org/2021/Talks/ (replace 2021 by the current year). There is no need to upload the Tools directory. It is is already there.

(Uploading requires HTTP PUT, WebDav or CVS. To set an ACL, you will need ,access.)

Writing slides

Slides

Each slide is a section element* with a class of slide:

<section class="slide">
  ... slide content here...
</section>

Inside the slides, use normal HTML elements (p, ul, em, etc.).

*) Note for advanced users: Although not shown in this template, it is in fact possible to use other elements than section. One common choice is div.

Speaker notes or comments

You can add additional text, such as speaker notes or explanations, between the slides. They will be visible in index mode but not in presentation mode. Use elements with a class of comment:

<section class="comment">
  ... text here...
</section>

Slide numbers

If a slide should not show the slide number, add the class clear:

<section class="slide clear">
  ... slide content here...
</section>

Title slides (cover slides)

For cover slides (the title slide or separator slides between parts of a presentation), add a class cover. You can combine cover and clear. E.g.:

<section class="slide cover clear">
  <h1>My presentations<h1>
  <address>Peter W. Slidemaker</address>
</section>

Illustrations on the left or right

Slides with narrower text and an illustration on the left or right can be made by adding the class side to the slide. Inside the slide there should be exactly one element that also has a class of side (an image or some other element). Two sizes are possible: normal (about 1/3 of the slide) and big (about 2/3 of the slide).

To put an image on the left:

<section class="slide side">
  <img src="..." alt="..." class="side">
  ... slide content here...
</section>

To put the image on the right, add class right (which may be abbreviated to r):

<section class="slide side r">
  <img src="..." alt="..." class="side">
  ... slide content here...
</section>

Add class big to the slide for a bigger image. To put the image on the left:

<section class="slide side big">
  <img src="..." alt="..." class="side">
  ... slide content here...
</section>

And on the right:

<section class="slide side r big">
  <img src="..." alt="..." class="side">
  ... slide content here...
</section>

Automatic slide shows

Slides can be made to advance automatically after a given time, by setting a data-timing attribute on them with a value of MM:SS (minutes and seconds). E.g.,

<section class="slide" data-timing="1:03">

This slide will remain on screen no longer than 1 minute and 3 seconds, after which the next slide will be shown.

(This feature is only available with the Shower script, not with b6+.)

Progress bar

If you want a progress bar during the slide presentation, add an empty div with a class of progress. It can be put before the first slide or after the last, but there should be at most one such element in the file:

<div class="progress"></div>

The progress bar will show as a thin red line along the top of the slides. Its length increases from zero on the first slide to 100% on the last.

Incremental display

To progressively reveal elements on a slide, put a class of next on all elements that should not be visible right away. They will become visible one by one as you press the space bar or an arrow key. E.g.:

<ul>
  <li>This item is visible when the slide appears
  <li class="next">This item is not immediately visible
  <li class="next">This is the third item to appear
</ul>
<p class="next">This is the last element to appear

Two columns

To put elements side by side in two columns, make an element (a div, ul or any other element) with class columns. The first child of that element will be put in the left column, the second child in the right column. If there are more children, the third will be in the left column again, the fourth in the right, etc.

<ul class="columns">
  <li>First goes on the left</li>
  <li>Second goes on the right</li>
</ul>

Small text

Less important text can be shown in a smaller font by giving it a class of note:

<p class="note">Note that this is harder to read</p>

Extra big text: shout

To make text extra big, give it a class of shout, e.g.:

<p class=shout>Hurray!

(Sometimes this is referred to as the ‘Takahashi method’: Instead of sentences or graphics, a slide only contains one or two keywords. The narrative comes from the speaker.)

Animated text: grow

To draw extra attention to some text or an image, it can be animated. Adding a class of grow to it will make it appear slowly. It will start small and one second after the slide appears it will begin to grow and reach its normal size three seconds later.

<p class=grow>See?

Automatic line numbering

Pre-formatted text (in a pre) can be given line numbers by adding the class numbered:

<pre class="numbered">

No more than 20 lines will be numbered. (In the normal font size, a slide fits 13 lines.)

3×3 Grid

It is possible to treat the slide as a 3×3 grid and put elements in the four corners, in the middle of each edge, or in the center of the slide. This is done by giving the elements a class of place. On its own, place puts the element in the center. By adding classes top, right, bottom and left the element can be placed in one of the eight other positions.

<div class="place">Put this in the center</div>
<div class="place bottom">Put this bottom center</div>
<div class="place top right">In the top right</div>

The direction classes can also be abbreviated to t, r, b and l.

Image overlays (background images)

To put an image behind the text of a slide, use an img with a class of cover:

<img class="cover" src="..." alt="...">

The image will be stretched to fill the whole of the text area. If the image doesn't fit exactly (wrong aspect ratio), the image will be cropped.

With a class of fit instead of cover, the image will be scaled but without cropping. Instead there may be white bands on the sides or above/below the image, if it doesn't fit exactly.

<img class="fit" src="..." alt="...">

This works both for normal slides and title slides (slides with a class of cover). The logo on the right is not obscured by the image.

White text

If the overlay image is dark, it may be better to use white text. That can be done by adding the class white to the slide:

<section class="slide white">

Other colors (blue titles, list bullets, links, etc.) are also lighter on such slides.

To make all slides white on black, set the class white on the body element. In that case you can use the class black on individual slides to give them black-on-white text.

Slide transitions

By default, each slide just replaces the previous one, but there are several predefined slide transitions. You can set a transition on the body element to apply it to all slides:

<body class="shower fade-in">

Or you can set it on individual slides, to apply only to the transition between that slide and the next. (I.e., it doesn't determine how the slide appears, but how it disappears.)

<section class="slide wipe-left">

You can set both a global transition and local ones. The global transition applies to slides that do not have an explicit transition set locally.

fade-in
The new slide appears faint at first and gets more opaque until it completely obscures the previous slide.
slide-in
The new slide moves in from the left, while the previous slide moves back to the left.
move-left
The new slides move in from the right while the old slide moves out to the left.
move-up
The old slide moves up and the new slide moves in from the bottom.
flip-up
A 3D effect: the bottom of the old slide is lifted up and the slide is turned over to reveal the new slide on its back side.
flip-left
Another 3D effect, but in this case the right side of the slide is lifted up and the slide is flipped over to the left, revealing the new slide on the back side.
center-out
A small circle appears in the middle of the old slide that reveals the new slide. The circle grows until it covers the whole slide.
wipe-left
The new slide moves in from the right, until it covers the old slide.
zigzag-left
A zigzag pattern moves in from the right. To the left is the old slide, to the right the new one.
zigzag-right
A zigzag pattern moves in from the left. To the left is the new slide, to the right the old one.
cut-in
The new slide moves in from the top left and covers the old slide.

Exporting to PDF

The slides can be exported to PDF (or printed) in two ways: multiple slides per page with comments interleaved, or one slide per page without any comments. The latter may be useful to create a PDF suitable for presenting, when it is not possible to use an HTML browser.

portrait
When printing in portrait mode, the output will contain as many slides per page as will fit and the comments are printed between the slides. This corresponds to viewing the slides in index mode.
landscape
When the output is in landscape mode, each page consists of one slide, without page margins, and without the comments between the slides.

Note: In landscape mode, the style sheet tries to set the size of the output page to exactly the size of a slide, but not all user agents that produce PDF respect that. (And, obviously, a printer is limited to the available paper.) There may be some black margin to the right and below each slide. Prince does respect the size. W3C team can also use the ",pdfui" tool online.

Presenting

Mouse gestures and keystrokes

To present the slides, load them into a browser that supports JavaScript and CSS and then press Shift+F5 (or Command+Enter on Mac) or click on the first slide. (If you are using b6+ instead of Shower, double-click or press the ‘A’ key to start the slide show.)

Navigate though the slides by pressing the spacebar, the arrow keys or Page-up/Page-Down. The Home and End keys jump to the first, resp. last slide.

To exit the presentation, press the Esc key.

The complete list of key strokes is in the Shower documentation. (For b6+, see the b6+ navigation keys & gestures.)