add details from presentations-internal repo

docs/details.md

+# Additional syntax and formatting
+
+Special syntax (through HTML comments) is available for adding attributes to Markdown elements.
+
+## Slide transition
+**data-transition** attribute is used to change default slide transition.
+  * possible values of *data-transition* attribute: zoom, fade, convex, convex, slide, strike, linear  + "-in" and "-out" optional suffixes
+  * possible values of *data-transition-speed*: fast, slow
+  * examples:
+    * Markdown
+      * fade-out
+  ```
+  # My fade-in fade-out slide title
+  <!-- .slide: data-transition="fade" -->
+  ```
+      * zoom-in fade-out
+  ```
+  # My zoom-in fade-out slide title
+  <!-- .slide: data-transition="zoom-in fade-out" data-transition-speed="fast"-->
+  ```
+    * HTML
+      * fade-in fade-out
+  ```
+  <section data-transition="fade">
+  # My fade-in fade-out slide title
+  </section>
+  ```
+
+## New slide
+  * Markdown - three empty lines or separate .md file
+  * HTML syntax - \<section\> element
+
+## Fragmentation
+It is possible to adjust behavior of fragments of your slide, e.g. order in which the elements are shown can be defined by class *fragment* with optional attribute data-fragment-index:
+  * Markdown
+  ```
+    * first element  <!-- .element: class="fragment"-->
+  <!-- .element: class="fragment" data-fragment-index="3" -->
+    * third element
+  <!-- .element: class="fragment" data-fragment-index="2" -->
+    * second element
+  ```
+  * HTML syntax
+  ```
+  ...
+  <div class="fragment" data-fragment-index="3">
+    third element
+  </div>
+  ...
+  ```
+  additional classes extending class fragment:
+    * special fragment entry: fade-in-then-semi-out, fade-in-then-out, semi-fade-out, zoom-in, fade-up, fade-left, ...
+    * highlighting: highlight-green, highlight-blue, highlight-red, highlight-current-red, ...
+    * hiding fragments: current-visible
+    * simple animation features: grow, shrink, strike
+
+# External resources
+
+For more tips on supported functionality visit official [reveal.js GitHub repository](https://github.com/hakimel/reveal.js/).
\ No newline at end of file