Learned layouts, CSS and layered views.
VBox, HBox, Canvas and Panel layouts place their content vertically, horizontally or using absolute positioning.
A feature of the Flex CSS is embedding font(s) into the application so that the look remains the same for all. The drawback to that is the increased size of the application.
There are three layered view components, the ViewStack, TabNavigator (which extends ViewStack) and Accordian. The latter two contain their own switching mechanism, the first has to include in custom code utilizing the selectedIndex or selectedChild properties or one of these four bars: TabBar, LinkBar, ButtonBar and ToggleButtonBar.