RadDock provides the Resizable property which makes the dock resizable when its value is set to true. By default its value is false. The RadDock control cannot be resized when it is collapsed.
When RadDock is placed in a vertically oriented RadDockZone (Orientation="Vertical"), grab the bottom handle to resize the dock vertically. Horizontal resizing is not allowed.
RadDock's client-side API provides the following events related to resizing:
OnClientResizeStart—fires when RadDock's resizing has started
OnClientResizeEnd—fires when RadDock's resizing has finished