BorderPanel
A controller that hosts up to 5 other controllers in a "border" layout.

Here's an example:
yaml
SubView:
Controller: BorderPanel
WestView:
DisplayLabel: Navigation
Controller: BorderPanel
Width: 155
Collapsible: True
Border: True
Split: True
NorthView:
Controller: HtmlPanel
Split: False
Html: <p><img src="%IMAGE(kitto_logo_150)%" width="150" height="47"></img></p>
CenterView:
Controller: TreePanel
TreeView: MainMenu
CenterView:
Controller: TabPanel
Border: True
SubViews:
View: Girls
View: Dolls
NorthView:
Controller: ToolBar
TreeView: MainMenu
SouthView:
Controller: StatusBar
Text: <p>User: %Auth:UserName%</p>
ImageName: personAnd here's the result:

As you can see in the WestView above, each sub-controller can in turn host other controllers, and so on. You can try to "comment" (just add a leading dot or otherwise alter the name) the NorthView and see what happens.
