Please be aware that Lyyti is developed constantly and your view might not match 100% with the view described in this article.
To change the layout of your Lyyti event, first go to the event. Move on to Registration page and, in the drop-down menu, select which layout you would like to use. Save and close.
If you don't have the layout you need, you can add new layouts in My layouts > Add layout (click here to read more).