Telerik RadTreeView does not support text-wrapping by default. You can, however, use the following approaches to accomplish the task:

• Using ToolTips - you can shorten the text of the nodes (say, display only the first 10 characters) and put the whole text in a tooltip using the ToolTip property of Telerik RadTreeView's nodes, e.g.:
  
  

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  <rad:RadTreeNode runat="server" Text="New York is .." ToolTip="New York is a beautiful city"/>

  
  
• Add line breaks to the text of the TreeNodes:
  
  

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  <rad:RadTreeNode runat="server" Text="Root<br>Node"/>

  
  To properly align the text you should add the following style to the treeview span tag:
  
  

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  <style>      #RadTreeView1 span      {       display: -moz-inline-block;       display:inline-block;      } </style>

  
  If the treeview resides in a naming container, you can get the name of the span tag from the HTML OutPut of the page.
• Using templates:
  
  http://www.telerik.com/DEMOS/ASPNET/TreeView/Examples/Functionality/Templates/DefaultCS.aspx