Sorry, I must not have been clear - I need the grid to be able to show and hide the grouping panel based on a toggle button. Simply setting groupable does not achieve this. The reason is I need to conserve vertical space on the page and having the grouping panel visible reduces the number of visible rows in the grid. Most of the time, users will not want to group, so therefore I have the grouping panel hidden, however, if they want to, I would like them to click a button and have it shown.
Thanks,
L.