I've set up an UltraWebGrid with a dropdown type column defined as follows..

                                <igtbl:UltraGridColumn BaseColumnName="EXTRADELAY1" Key="EXTRADELAY1" IsBound="false" Type="DropDownList"  Width="40px" CellButtonDisplay="Always" ValueList-Style-Width="500%">
                                    <Header Caption="Extra<br />Delay<br /><br />1">

                                    </Header>
                                    <ValueList>
                                        <ValueListItems >
                                            <igtbl:ValueListItem DataValue="15" Key="15" DisplayText="15 Minutes" />
                                            <igtbl:ValueListItem DataValue="30" Key="30" DisplayText="30 Minutes" /> 
                                            <igtbl:ValueListItem DataValue="45" Key="45" DisplayText="45 Minutes" /> 
                                            <igtbl:ValueListItem DataValue="60" Key="60" DisplayText="1 Hour" />
                                            <igtbl:ValueListItem DataValue="60" Key="60" DisplayText="1 Hour" />                                                                                                                     
                                            <igtbl:ValueListItem DataValue="90" Key="90" DisplayText="1.5 Hours" />
                                            <igtbl:ValueListItem DataValue="120" Key="120" DisplayText="2 Hours" />
                                            <igtbl:ValueListItem DataValue="180" Key="180" DisplayText="3 Hours" />
                                            <igtbl:ValueListItem DataValue="360" Key="360" DisplayText="6 Hours" />
                                            <igtbl:ValueListItem DataValue="720" Key="720" DisplayText="12 Hours" />
                                            <igtbl:ValueListItem DataValue="1440" Key="1440" DisplayText="1 Day" />
                                            <igtbl:ValueListItem DataValue="2880" Key="2880" DisplayText="2 Days" />
                                        </ValueListItems>
                                    </ValueList>
                                </igtbl:UltraGridColumn>

Eventually it will be bound to data - for the moment I'm just trying to get the correct functionality.

I have the column width correct for read-only display, but when the dropdown opens I need the valuelist to be wider than the column to clearly display the text of the choices.

I've tried using ValueList-Style-Width with a pixel value and with a percentage value but the dropdown stays the same width as the column. How can I make the dropdown wider than the column width?

This is v10.2 by the way.