I used this:
<Scrolling AllowScroll="true" SaveScrollPosition="true" UseStaticHeaders="true" ScrollHeight="500px" />
and now my grid width changes in odd ways and it is so wide it has horizontal scoll bars. I read this artticle and I think I'm doing it correctly: http://www.telerik.com/DEMOS/ASPNET/Prometheus/Grid/Examples/Client/Scrolling/DefaultCS.aspx
<telerik:RadGrid id="RadGrid1" runat="server" datasourceid="SqlDataSource1" gridlines="None"
skin="Office2007"
OnItemCommand = "RadGrid1_ItemCommand"
OnItemCreated="RadGrid1_ItemCreated"
Width="800px"
AllowSorting="True" ShowFooter="True" EnableAJAX="True">
<
ClientSettings EnableRowHoverStyle="True" >
<
Selecting AllowRowSelect="True" />
<
ClientEvents OnRowClick="Dummy"></ClientEvents>
<Scrolling AllowScroll="true" SaveScrollPosition="true" UseStaticHeaders="true" ScrollHeight="500px" />
</
ClientSettings>
<
pagerstyle mode="NumericPages" position="TopAndBottom" />
<
MasterTableView DataSourceID="SqlDataSource1" AutoGenerateColumns="False" AllowAutomaticDeletes="true" DataKeyNames="CourseIDX" CommandItemDisplay="Top" ClientDataKeyNames="CourseIDX">
<
Columns>
<
telerik:GridBoundColumn DataField="CourseIDX" UniqueName="CourseIDX" HeaderText="CourseIDX" Display="False"></telerik:GridBoundColumn>
<
telerik:GridBoundColumn DataField="CourseID" UniqueName="CourseID" HeaderText="CourseID" Display="false"></telerik:GridBoundColumn>
<
telerik:GridBoundColumn DataField="Name" UniqueName="Name" HeaderText="Name" Display="True" > <ItemStyle Width="300px" HorizontalAlign="Left"/></telerik:GridBoundColumn>
<telerik:GridTemplateColumn HeaderText="Preview" UniqueName="Preview">
<ItemTemplate>
<asp:HyperLink ID="Preview" runat="server"
ImageUrl="~/images/nav/search.gif"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn HeaderText="Course Properties" UniqueName="EditCourse">
<ItemTemplate>
<asp:HyperLink ID="EditCourse" runat="server"
ImageUrl="~/radcontrols/grid/skins/edit.gif"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn HeaderText="Edit Tree" UniqueName="EditTree">
<ItemTemplate>
<asp:HyperLink ID="EditTree" runat="server"
ImageUrl="~/images/fileimages/3domain.gif"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn HeaderText="Edit Sheet" UniqueName="EditSheet">
<ItemTemplate>
<asp:HyperLink ID="EditSheet" runat="server"
ImageUrl="~/images/fileimages/resx.gif"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn HeaderText="Edit Points" UniqueName="Points">
<ItemTemplate>
<asp:HyperLink ID="Points" runat="server"
ImageUrl="~/images/fileimages/resx.gif"></asp:HyperLink>
</ItemTemplate>
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridTemplateColumn>
<telerik:GridButtonColumn ButtonType="ImageButton" HeaderText="Student Status"
ImageUrl="~/radcontrols/grid/skins/windows/update.gif"
CommandName="SStatus" UniqueName="SStatus" >
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridButtonColumn>
<
telerik:GridButtonColumn UniqueName="column" HeaderText="Delete" ConfirmText="Confirm Delete of Course!!!" Text="Delete" CommandName="Delete" ButtonType="ImageButton">
<ItemStyle Width="50px" HorizontalAlign="Center"/>
</telerik:GridButtonColumn>
</Columns>
<RowIndicatorColumn Visible="False">
<HeaderStyle Width="20px" />
</RowIndicatorColumn>
<ExpandCollapseColumn Resizable="False" Visible="False">
<HeaderStyle Width="20px" />
</ExpandCollapseColumn>
<
EditFormSettings>
<
EditColumn CurrentFilterFunction="NoFilter" FilterListOptions="VaryByDataType"></EditColumn>
</
EditFormSettings>
<CommandItemTemplate>
<asp:LinkButton ID="LinkButton4" runat="server" CommandName="Rebind"><img style="border:0px" alt="" src="/RadControls/Grid/Skins/Windows/Refresh.gif" /> Refresh</asp:LinkButton>
<asp:Image ID="Image1" runat="server"
ImageUrl="~/RadControls/Grid/Skins/Windows/AddRecord.gif"/>
<a href="/Instructor/ICWNewCourse.aspx" target="_blank">New Course</a>
</CommandItemTemplate>
</
MasterTableView>
<ExportSettings>
<Pdf PageBottomMargin="" PageFooterMargin="" PageHeaderMargin="" PageHeight="11in"
PageLeftMargin="" PageRightMargin="" PageTopMargin="" PageWidth="8.5in" />
<
Excel Format="Html"></Excel>
<
Csv RowDelimiter="NewLine" ColumnDelimiter="Comma"></Csv>
</ExportSettings>
</
telerik:RadGrid>