On the grid, if I click on header of column sometimes I see a drop down with list of all the column names. Say I am clicking on header H1 and I see the drop down list now I am clicking on H2 from that list (Say H2 is name of another column on that grid). Now H1 is replaced by H2 column. I dont want to see this drop down at all. I dont know which property on my grid is setting this appear. How to I get rid of that drop down with list of all columns on the grid.

Thanks,

Sindhu