Use the HTML5 theme for all Genero Web Client applications.
HTML5 theme overview
The HTML5 theme is based on HTML5, the 5th major revision of the Hypertext Markup Language (HTML). This theme is dedicated to the latest Web browser releases and mobile devices (tablets and smartphones).
Understanding layouting with the HTML5 theme
The default layout is stretchable. This feature is provided by snippets and JavaScript™. If you consider adding your own widgets, you need to understand how layouting is implemented by the HTML5 theme.