Is there a way to add a fontawesome icon to a grid column

We have a grid with a column of type ‘coro’ (readonly como) but the problem is many people are not able to figure there is a dropdown which appears on clicking the columns(as all columns look alike).We are using dhtmlx connector on the server side to populate the values using data processor on client. Is there a way to add a fontawesome icon in the background of a that column to indicate there is a dropdown that appears on clicking it ?
Basically we want to alter the css of that grid column to show visually its an editable column via some visual icon. is it possible?

Unfortunately such feature is not supported in the co/coro column types.
The only solution is to use the “combo_v” (“combo” variation) column type or create your own/customize the existing column type.