The editors design view is empty and to small in Chrome 34 if the editor is in a radWindow.
<asp:Button runat="server" ID="btnOpenPopup" Text="Open poup" OnClick="btnOpenPopup_Click" /> <telerik:RadWindow ID="rdwNewAddressAtLocation" runat="server" Width="805" Height="450"> <ContentTemplate> <telerik:RadEditor ID="redNotes" Skin="Default" NewLineBr="true" height="200" width="400" runat="server" Language="sv-SE" StripFormattingOnPaste="MSWordRemoveAll" ContentFilters="FixEnclosingP"> </telerik:RadEditor> </ContentTemplate> </telerik:RadWindow>protected void btnOpenPopup_Click(object sender, EventArgs e) { rdwNewAddressAtLocation.VisibleOnPageLoad = true; redNotes.Content = "<b>Testing</b>"; }