Customizing list view for Sales Order to show date it was created instead of last modification

Hi, I was trying to use “customize form” to show date of creation in list view but it doesn’t seem to do what i expect it to do. Nothing pops up in list view, no new column or anything. I really don’t need to see when something was last modified when I’m looking on the list of all Sales Orders but seeing when one was created would come in handy