How Do I Enable The Dropdown Arrow For A Combobox Withing A Column.

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VB

ASP.NET

WebForms

the following is the code for my Combobox within a column for the user to choose from.
the combo box i fully fuctional.
as of now the cell where the combobox is present is visible as a regular empty cell
i have to double click on the cell before the small arrow on the right of a combobox to appear and the list then drops down.
how do i get the combobox arrow to be visible at all times so that the user can know for sure that the particular cell is a combox box on the first look?

<ext:Column   DataIndex="BUYERRESPONSE" Text="Meeting review" Resizable="true"  Width="150"  runat="server" Editable="true" Hidden="false">
    <Editor>
         <ext:ComboBox ID= "BUYERRESPONSE"   runat="server">
            <Items>        
              <ext:ListItem Text="YES" Value="YES"></ext:ListItem>
              <ext:ListItem Text="NO" Value="NO"></ext:ListItem>
            </Items>
        </ext:ComboBox>
     </Editor>
</ext:Column>