PageLayout is used to layout areas of a page. The PageLayout should be RootUIElementContainer of the topmost view in the view hierarchy of the application. Don't use a second PageLayout in views which are nested into the topmost view.
PageLayout can have up to nine panels aggregations. Each panel can have a background color and different borders. PageFullWidthPanel have always the width of 100%.
The PagePanel view element is used as a panel of a page layout. Each panel of this type is placed next to each other.
The PageFullWidthPanel view element is used as a panel of a page layout. Each panel of this type is placed above each other and has a full width (100%).
PageLayoutBorder (enumeration: none=nix, closure= small border is displayed)
PageLayoutBackground (enumeration: transparent, plain=white background, fill=filled with a color)