Nested[Sample|Source|Documentation] Description C1Splitter supports templating , which you can use to make a nested splitter. In order to make the nested sample, the following properties and events are used in this sample. ContentTemplate FullSplit Orientation OnClientExpanded OnClientCollapsed OnClientSized This sample uses the ContentTemplate to nest the hsplitter in the vsplitter. Here, the FullSplit property is used to fill the vsplitter's whole panel2 and with the OnClientExpanded/OnClientCollapsed/OnClientSized events the nested splitter(hsplitter) can be refreshed after the vsplitter is resized(expanded/collapsed/sized).