Master Page Support
ZeeControls work with ASP.NET MasterPage.  On this page, Web Splitters are placed in the master page, and a ContentPlaceHolder control (with a green border) is placed at the lower-right panel for child pages to display page-specific contents.

Note that the nested containers within the ContentPlaceHolder will also resize with their parent containers.
Child1a.aspx (nested Web Splitter)

Child1b.aspx (nested WebDock)
Folders
Folders
Main content in WebDock
Properties
Properties
Output
Output