Create animated content by adding reveal options to your slides:

To animate an element of your presentation, add a reveal option:
This =>{reveal=next}arrow is animated
Right now, animation support is very basic: Only arrows and lists can be animated; and the only reveal option is "next". We are working on more animation features.
In the preview of the main window, animations are indicated by their sequence number: The first animated item on a slide shows a "1", the second shows a "2", and so on.
When you start the presentation and navigate to a slide that contains animations, the animated items are shown when you navigate "next"—that is, when you press the right arrow, page down key or the next-button in the presenter screen.