1. The top level of a page shout be the ROOTUIELEMENT
2. Each visible group of UI elements should be put in a Transparent Container. If a visible headline will be given to this group, it should be done as follows:
3. Add a Section Header UI Element inside the Transparent Container. The Section Header's "Level" attribute should be set to "header4","header5", or "header6". Select the Transparent Container's attribute "LabeledBy" to be the ID of the Section Header.