I have a combo box in the header area. The record source, Bound Column are set correctly ( I know because I tested it on a form ). In this instance, the user would select from the dropdown list, the name of a member of staff, based on the click-event, and passing the Staff_ID to a variable, this would be used to filter a recordset/recordsource for the report. However, there is no dropdown ( or arrow on combo - so no name can be selected ) ? Any ideas. 
