If you're in MAS 9.1+ there's a new system property mxe.webclient.labelMultipartDescription that you can enable. This will show a label above multipart textboxes like this. There was a bug initially that caused it to not display the labels correctly so you'll want to be on 9.1.7+ or higher of Manage DT455677 After setting True in the property mxe.webclient.labelMultipartDescription, fields that uses multpart text box are getting the first label updated with the text "description"