This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
As editor you can set an animation to your content elements if you go to the Animation tab.
The screenshot below shows you how to set a animation. You have the possibility to set the animation speed and the delay of that content element as well individually.
Please look at your animation in the frontend to guarantee a nice look an feel for your users if they scroll your page!
If any element is animated in a different direction it can be very disturbing.